After a long cooking session, those greasy grates and splattered burner caps are the last thing you want to scrub by hand. So here’s the question:can you just toss your cooktop parts in the dishwasher and let the machine do the work?
Let’s walk through it, part by part.
Why No Cooktop Parts in Dishwasher?
Cooktop components are exposed to heat, grease and food spills every day, but that doesn’t necessarily mean they are designed to withstand a dishwasher cycle.
Depending on the material and construction of the part, dishwasher cleaning may contribute to:
- Discolouration or dulling of finishes
- Corrosion or rust on susceptible metals
- Damage to protective coatings
- Fading of markings on control knobs
- Moisture remaining around burner components
- Deterioration of rubber or silicone components
Rather than trying to determine which cooktop parts in the dishwasher might tolerate a cycle, the safer approach is to follow the cleaning instructions supplied with your cooktop and hand-clean removable parts where recommended.
Gas Cooktop Grates and Trivets
Grates and trivets are some of the most exposed parts of a gas cooktop, regularly collecting grease, spills and food residue. Depending on the cooktop, they may be made from cast iron or feature protective enamel or porcelain-style coatings.
While these surfaces are designed to withstand cooking temperatures, that doesn’t mean they should be cleaned in the dishwasher. Dishwasher detergents, prolonged moisture and repeated washing may affect certain finishes or contribute to corrosion where the underlying metal is exposed.
Instead, clean grates and trivets by hand according to the care instructions for your cooktop. Use warm water and a suitable non-abrasive cleaning method, then dry each part thoroughly before placing it back on the cooktop.
A few practical loading notes for when grates do go in:
- Care must be taken to load grates securely to prevent hitting other items during a wash. A loose, heavy grate sliding around the rack can chip mugs, crack glass, or damage the dishwasher itself.
- Heavy grates can chip the plastic coating on dishwasher tines, which exposes the wire rack to rust.
- Pre-rinsing baked-on grease before loading into the dishwasher is advised. The machine can cut through fresh grease, but carbonized buildup rarely comes off in a standard cycle.
- Loose components attached to cooktop parts should be removed before washing. Rubber bumpers or silicone feet on grates, for instance, can degrade in a hot wash.
On that note, cleaning instructions vary by manufacturer and should be checked in the manual before the first wash.
Gas Burner Caps and Burner Heads
These two parts sit at the center of each gas burner, and they need different treatment.
Burner caps are the flat discs that sit on top of the burner head and spread the flame. Some are solid stainless steel or enamel-coated metal. GE allows certain round burner caps to go in the dishwasher on specific models. However, enameled burner caps should not be washed in the dishwasher according to JennAir’s cleaning guidance, because the detergent and heat can discolor or pit the enamel surface. If the enamel cracks, the metal underneath corrodes.
Replacing a damaged set of burner caps costs between $100 and $250 depending on brand and model, so the stakes are real.
To clean burner heads safely:
- Soak in warm water with a mild degreaser for 15 to 30 minutes.
- Use a toothpick, fine needle, or small-gauge wire to clear each flame port.
- Rinse, then dry thoroughly before reassembly.
Moisture can interfere with ignition in gas cooktops. If water remains in or around the ignition electrode after cleaning, the burner may not light or may spark erratically. Drying cooktop parts immediately after washing can prevent rust and ignition issues alike.
Removable Control Knobs
Cooktop control knobs may be made from plastic, metal-look plastic or metal, and should be cleaned carefully by hand. Dishwasher heat and detergent may affect certain materials, finishes or printed temperature markings and symbols.
If the knobs are removable, clean them with warm soapy water and a soft cloth, following the care instructions for your cooktop. Dry them thoroughly before placing them back in position.
Removable Trim, Rails, and Glass Pieces
Some gas and ceramic cooktops may have metal trim rails or decorative bezels. These parts can have different finishes, coatings, rubber components or adhesive backing, so they should not be placed in the dishwasher. Instead, follow the cleaning instructions for your specific cooktop and use a soft cloth with a suitable cleaning product where recommended.
Glass-ceramic cooktop surfaces should be cleaned in place using a suitable cooktop cleaner and a soft, non-abrasive cloth. Always allow the surface to cool before cleaning.
Safe Cleaning Tips for Cooktop Parts
Instead of placing cooktop parts in the dishwasher, clean removable components by hand according to the care instructions for your specific cooktop.
A few general cleaning tips include:
- Allow the cooktop and its components to cool completely before cleaning.
- Use warm water, a soft cloth or non-abrasive sponge, and a suitable mild cleaning product where recommended.
- Avoid harsh or abrasive cleaners that may affect coatings, finishes or markings.
- Pay attention to small openings and detailed areas where grease or food residue may collect.
- Avoid soaking electrical or ignition components or other parts that are not intended to be submerged.
- Rinse removable parts where appropriate and dry them thoroughly before placing them back on the cooktop.
- Make sure all components are correctly positioned before using the cooktop again.
Always check the care and cleaning instructions for your specific cooktop model, as cleaning requirements can vary between components.
Cooktop Parts You Should Never Put in a Dishwasher (and Safer Cleaning Options)
Some cooktop components can be affected by dishwasher detergent, heat and prolonged exposure to water. To avoid unnecessary damage, hand-clean removable cooktop parts according to the care instructions for your specific model.
Electrical and Electronic Components
Electrical and electronic components should not be placed in the dishwasher or submerged in water. These may include:
- Ignition electrodes and spark components
- Wiring and electrical connections
- Touch control panels and indicator lights
- Internal control components
Moisture may interfere with the operation of electrical and ignition components. These parts should be cleaned only according to the care instructions for your cooktop.
Sealed Gas Assemblies and Valves
Gas valves, manifold components and other internal gas components are not intended to be removed for routine cleaning. Do not place these components in the dishwasher or attempt to disassemble them yourself.
If an internal component requires cleaning, inspection or servicing, refer to your product manual or contact an appropriately qualified professional.
Glass Control Panels and Integrated Controls
Modern induction and ceramic cooktops often have touch-sensitive glass panels with integrated controls. These are cleaned in place with a damp microfiber cloth and a non-scratch glass cleaner.
Touch-sensitive glass panels and integrated controls should be cleaned in place using the cleaning method recommended for your cooktop. Avoid attempting to remove integrated components for routine cleaning.
Rubber Gaskets, Silicone Boots, and Soft Seals
These small parts appear around burner assemblies, under knobs, and along wiring routes. Dishwasher conditions, including heat and harsh detergents, may affect certain rubber and silicone components over time, potentially leading to hardening, cracking, or swelling. Once a seal loses its shape or flexibility, it can no longer protect internal components effectively. Gently hand-clean these soft parts according to your user manual, and replace any seals that show signs of degradation.
Old, Rusted, or Cracked Metal Parts
A heavily corroded, cracked, or damaged cooktop part won’t be restored through aggressive cleaning. If a component shows significant rust, cracking, chipping, or other structural damage, check your product manual or seek appropriate service advice before continuing to use it. Replacement is often the safest path.
Safer Hand-Cleaning Methods
For removable cooktop parts, hand-cleaning according to your product’s care instructions is the recommended approach.
| Part | Cleaning Method |
| Burner heads (brass or aluminum) | Soak 15-30 min in warm water with mild dish soap. Clear ports carefully. Rinse and dry completely. |
| Cast iron grates (bare) | Warm water, nylon brush, no soap. Dry immediately. |
| Control knobs (plastic) | Wipe with a damp cloth and mild soap. Dry with a towel. |
| Glass cooktop surface | Spray with glass cleaner. Wipe with a microfiber cloth. |
| Rubber gaskets and seals | Wipe gently with a damp cloth. Do not soak. |
Before You Start Cleaning
A few safety steps before removing anything beyond the obvious surface parts:
- Turn off power and gas at the wall or shutoff valve.
- Let all components cool completely before handling.
- If you’re unsure whether a part serves an insulation or grounding function, leave it in place and consult a licensed technician.
Taking a moment to choose the right cleaning method protects both the cooktop and your household. When in doubt, a soft sponge and warm soapy water will always be gentler than a dishwasher cycle, and a lot cheaper than replacing parts you didn’t need to damage.
Key Takeaways
- Avoid placing cooktop parts in the dishwasher unless the care instructions for your specific appliance explicitly state otherwise.
- Hand-clean removable grates, burner components, knobs and other parts using the recommended cleaning method.
- Keep electrical, ignition and internal components away from unnecessary moisture.
- Allow cleaned components to dry thoroughly before placing them back on the cooktop.
- Always check your product manual before removing or cleaning any component you’re unsure about.
- When replacing a cooktop or planning a kitchen upgrade, check available stock and choose a model that suits your cooking and maintenance needs.
Taking a little extra time to care for your cooktop can help keep its components clean and well-maintained.
Looking for more kitchen care tips? Read our guide to Gas Cooktop Repair: Common Problems, Safety and Maintenance or learn How to Clean Rangehood Filters and Why It Matters.
