Why Your RACO Glass Lid Fogs Up and How to Fix It
By RACO Australia | Published: 2026-10-24
Category: Tips & Care
Wondering why your RACO glass lid steams up during cooking? Learn the common causes and simple fixes to keep your RACO Reliance glass lid clear and functional.
Quick answer
Fogging on your RACO glass lid is normal steam condensation caused by temperature differences, but excessive moisture or trapped droplets may indicate a poor seal or cooking at too high a heat. Adjust your heat level and ensure the lid fits snugly; if fogging persists with visible steam escape, the glass lid may need replacing.
Why fogging happens and when it's a problem
A foggy glass lid is not a defect — it's physics. When hot steam from your food meets the cooler glass surface, it condenses into tiny droplets that create a fogged appearance. This is especially common when you lift the lid briefly or cook at high heat with a tight-fitting lid.
Occasional fogging is harmless and often clears as the glass warms up. However, if the lid stays fogged throughout cooking or you see water pooling under the rim, the seal between the glass and the metal rim may be compromised. A damaged seal lets steam escape unevenly, causing persistent condensation and reducing cooking efficiency.
Heat management is key
Cooking on high heat with a glass lid traps more steam than necessary, leading to heavy fogging and potential boil-overs. For most stovetop cooking — simmering soups, steaming vegetables, or braising — medium to medium-low heat is sufficient. The glass lid retains heat well, so you can often lower the heat once the dish reaches a gentle simmer.
If you notice fogging even on low heat, check that the lid is centered properly. A slightly tilted lid creates a gap that lets steam condense unevenly, making fogging appear worse than it is.
Diagnose and fix your foggy glass lid
- Symptom: The glass lid fogs up during cooking and stays fogged for several minutes after you remove the heat.
- Likely cause: Normal steam condensation due to a temperature difference between the hot food and cooler glass, often made worse by cooking at high heat or a slightly loose fit.
- Corrective action: Reduce the heat to medium-low once the dish reaches a simmer. Ensure the lid is centered squarely on the pot. If fogging persists, inspect the rubber or silicone seal around the rim for cracks or gaps. If the seal is intact and fogging still bothers you, try wiping the inside of the lid with a dry cloth before placing it on the pot — this removes moisture that can amplify fogging.
- When to stop or choose another option: If the glass is cracked, chipped, or the metal rim is warped, do not use the lid. Order a replacement RACO Reliance glass lid in the correct size. A damaged lid can shatter under heat and is not safe to repair.
RACO Reliance glass lids: what to know
- RACO Reliance Glass 26cm Lid: This spare part is suitable for all RACO Reliance 26cm products. If your 26cm lid has a damaged seal or cracked glass, replacing it with this genuine part restores a proper fit and reduces condensation issues.
RACO Reliance Glass 26cm Lid - RACO Reliance Glass 24cm Lid: This spare part is suitable for all RACO Reliance 24cm flared shaped products. The flared shape of 24cm Reliance cookware means the lid must match exactly; using the correct spare ensures a snug seal and minimizes steam loss.
RACO Reliance Glass 24cm Lid - RACO Reliance Glass 28cm Lid: This spare part is suitable for all RACO Reliance 28cm products. A 28cm lid that no longer seals properly can cause uneven fogging and longer cook times; replacing it with the genuine part restores performance.
