Care, lids and gaskets
The part that wears out first, and how to make it last longer.
The dish is not the weak point
People buy glass storage expecting the glass to be the thing that eventually fails, and it very rarely is. What fails is the lid: the silicone gasket that seals it, and the four plastic clips that hold it down. Both are consumable in a way the dish is not.
Understanding that changes how you treat a set. The glass can go through anything a domestic kitchen offers. The lid wants a gentler life, and giving it one is the difference between a set that leaks after eight months and one that still seals after three years.
What kills a gasket
- Heat under pressure. A sealed lid in a microwave gets hot and gets squeezed at the same time, and silicone takes a permanent set from that combination. This is the single most common way a lid stops sealing.
- The bottom rack of a dishwasher. The heating element sits down there, and the temperature near it is well above what the rest of the machine sees.
- Oil left in the groove. Fat degrades silicone slowly and it also stops the gasket seating flat. The groove needs an occasional deliberate clean.
A five minute routine, once a month
- Pull each gasket out of its groove. They are designed to come out; if one resists, work it from a corner.
- Wash both parts separately in hot soapy water. The groove holds more than you would think.
- Dry the groove before the gasket goes back, and seat it flat all the way round with a fingernail.
- Close the lid on an empty dish and check the clips still meet without force. A clip that needs pushing is a clip about to break.
Smells and stains
Glass does not hold onto smells; lids and plastic boxes do. A soak in warm water with a spoon of bicarbonate of soda handles most of it. For a curry smell that will not shift, a day outside in daylight does more than any amount of scrubbing.
Tomato staining on plastic is permanent, and no method removes it. Wiping the inside of a clear box with a little oil before a tomato sauce goes in slows it down considerably.
Stacking and storage
Store the dishes stacked and the lids separately, flat, rather than clipped on. A lid left clipped to an empty dish holds its gasket compressed for weeks at a time, which is the slow version of the microwave problem. It also means the cupboard smells of nothing.
If a set came with dividers or small sauce cups, keep them in one box rather than distributed through a drawer. The parts that go missing are always the small ones, and a set missing its cups quietly stops being used.
When to replace what
| Part | Retire it when | Rough life |
|---|---|---|
| Glass dish | Rim is chipped or cracked | Years; often outlives several lids |
| Gasket | Sits proud of the groove, or leaks in a bag | One to three years with care |
| Clips | One will not close, or has gone white at the hinge | Similar to the gasket |
| Plastic box | Base no longer sits flat, lid stops snapping | Dozens of cycles, then replace |