How to Clean Glasslock Square and Rectangle Lids

Quick answer

Wash Glasslock square and rectangle lids by hand in warm soapy water, paying extra attention to the silicone gasket, and air-dry them completely before storing. Avoid the dishwasher and harsh scrubbing to keep the seal intact.

Step-by-step lid cleaning routine

1. Rinse immediately after use: Rinse the lid under warm running water right after emptying the container. This prevents food from drying onto the silicone gasket and reduces staining. Don't let the lid sit with food residue—dried-on particles are harder to remove and can stain the gasket.
2. Wash with mild soap and warm water: Use a soft sponge or cloth with a mild dish soap and warm water. Gently wash the entire lid, paying extra attention to the underside of the gasket where residue can hide. Avoid abrasive scrubbers that can scratch the plastic and damage the gasket. Check the gasket crevice for trapped food—it's the most common area to miss.
3. Rinse thoroughly and air-dry: Rinse all soap off with clean warm water. Shake off excess water and place the lid on a drying rack with the gasket facing up. Let it air-dry completely before storing. Moisture left on the gasket can promote mold—ensure it's fully dry before putting the lid on the container.
4. Tackle stains with a baking soda paste: For stubborn stains on the lid or gasket, make a paste of baking soda and water. Apply it gently with a soft cloth, let it sit for a few minutes, then rinse. This works well for tomato or curry stains. Avoid bleach or harsh chemicals—they can degrade the silicone and plastic.
5. Inspect the gasket regularly: After each wash, run your finger along the gasket to check for cracks or looseness. If the seal feels damaged, the lid may no longer be airtight. Since gaskets can't be replaced separately, you'll need to order a new lid. Catching a damaged gasket early prevents leaks and keeps your food fresh.

Replacement lids and what to know

• Square Lids: Lid sizes correspond to the model number located on the bottom of your glass container (letters followed by the first three digits). The color of the lid and/or silicone gasket may vary. When ordering a replacement square lid, check your container's model number to ensure a correct fit, and don't worry if the new lid's color differs slightly from your original.

  

• Rectangle Lids: The gaskets are not available as a separate replacement part at this time; only the whole lid can be replaced. Since you can't buy just the gasket, gentle cleaning is essential to avoid damaging it and needing a full lid replacement.