Ceramic Cooktop (non induction) getting damaged after use

I have a ceramic-coated pan too, and always treated it with care (plastic utensils, no overheating, etc.) It failed too, after some time (I think I've had it for 9 months now, and used frequently).

Unlike a failed Teflon pan, it does not look or feel any different. But while at the beginning it was superslick, with everything gliding right off it in a fluid motion, now it is only moderately non-stick. I can still use it as normal, including for such problematic cases as omelets. But if I fry without fat, I need a spatula to dislodge the omelet from the surface. In contrast, when I bought it it was like polished ice. It is still more non-stick than, say, enamelled or seasoned iron, and definitely better than stainless steel. But it isn't as good as a good-quality PTFE.

If the non-stickness keeps at this level, I still think that it makes sense to buy it, if you have the money. They are expensive, especially the brand-name ones, but can give you nice, even heating. While they will give you less non-stick performance, they are more robust than PTFE - metal utensils don't damage them, they don't overheat as easily - and I found the non-stickiness sufficient. The nice thing about them is that the quality ones aren't thin aluminium, mine has a 10 mm sandwiched steel bottom - you don't get this in PTFE. So they can be used for applications impossible with PTFE, and will give you a better heating in the cases where PTFE would have worked.

On the other hand, you can decide to go traditional, with a combination of PTFEs for the sticky applications and iron or steel for everything else. It will probably give you a better tool for the stickies, as long as the PTFE coating itself doesn't fail through accidental overheating. It is up to you which style you prefer, but the ceramics aren't the panacea they are touted as.

My name is Tom Wirt, with Clay Coyote Pottery. I'll try to shed some light on the intricacies of clay cooking pots, especially tagines.

You can use any flameware tagine directly on the glass stovetop. This includes, Emile Henry, Le Crueset, and Clay Coyote flameware. These are pots with either a metal base (Le Crueset) , or a type of ceramic called flameware (Emile Henry, Clay Coyote which is formulated and made to take direct heat.

Normal stoneware clay pots and earthenware pots will not do this. Stoneware should never go on a direct heating source, gas, electric or glasstop. It will crack with or without a diffuser.

Earthenware ceramic pots, typically identified by a reddish clay color and some absorbency by the bare clay (typically the bottom), do need a diffuser and should be started over a low heat. They can crack if used over sudden or too high a heat. Remember that these pots were originally used over charcoal fires.

Metal, obviously is fine.

The flameware ceramic pots, are designed for direct heat and are actually especially good on glasstops as the top spreads the heat better than electric or gas. Clay is a insulator, not a conductor. Thus the heat doesn't spread much, but, with a highly liquid food like a tagine, the liquid spreads the heat. Basically a tagine is cooked at a simmer, even though the pot would take the heat. Induction stoves require a metal plate with ceramic cookware to turn the electromagnetic force into heat.

You can find more info on my blog.