Q&A for How to Clean Teflon

I do not because it would scratch and ruin the pans. Wash them by hand.

Either will do, they'd have the same effect on the teflon.

When PTFE is overheated, it releases fumes that are very toxic to birds and less toxic (but still toxic) to humans. No solid compounds are released. There are usually two layers below PTFE - mid-coat and primer. There is little information available about what substances are they and whether they are safe, but it seems logical that any reasonable company uses as safe compounds as possible. Below the coating is some metal. If the pan is so damaged it is visible, its safety depends on whether this metal is safe for food contact.

You can, but the water usually gets way too hot. It will ruin the coating after a while. If you feel you must put it in the dishwasher, turn off the heated dry.

Season the pan by using a small amount of cooking oil and spread it all over the non-stick surface using a paper towel. The pan will most likely suck up the oil. I would use a mild flavored cooking oil (canola, etc.) instead of olive oil.

Get a water softener. The softer water will be better for everything in your entire household, including all the plumbing, as well as your bath and shower water. This will make rinsing much easier.