underwire bra keep breaking why?

sounds like they may be to small, It is very hard for a women to get the right fit, you should have someone measure you. It is all to come that women do wear the wrong size. any yes, puttin them in a dryer is not good for the bra. I would get measured, I am sure you will be surprised that you are wearing the wrong size

They are either made of cheap material - or you are wearing them too long. If you want a good bra - you have to pay money for it. Also, if you keep bra’s too long, they loose their shape and the wires may come out.

Also, do not put bra’s in the dryer. That could be part of your problem also. The dryer will mis-shape bras and are too rough with them.

Your cup size is most likely incorrect. That said you should make sure your underwires are steel and not plastic. And wash your lingerie by hand in mild detergents and dry them on a towel on a countertop. Using a dryer damages the fabric more than wearing them. There are several videos on You Tube or myskins.com about lingerie care.

You might be bigger in size or cup… Get measured, try a couple of different kinds…

because they dont fit orr are cheap and crappy (no offence)