We have tried several different cookie sheet style pans in our convection oven and every one of them has warped. Is anyone else having this problem? Is this normal?
I've used regular cookie sheets for 3 years now and haven't had any problems with warping, also use metal pans for other baking with no problems. Not sure why your pans would warp, I think I would call the customer service dept for your oven and ask them why this is happening.
Have you checked your temps with a thermometer? Could your oven be hotter than the temp that was set?
Check your temps, but this may just be normal. Our cookie sheets "flex" in our regular home oven with either regular or convection baking. Our "Professional" style sheets which are the air-bake style sheets, described by Popsie, don't do this.
Are you baking or cooking at very high tempurature settings?
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