+1 on GE, mine is a fairly highish end GE Profie, I bought it online, shipped it to my garrage and installed it myself five years ago. It’s does an absolute stellar job, quiet as a church mouse, and I really like its steam cycle, long but thorough.
As others have mentioned look to your water quality. At the risk of “keep things simple” reread the manual? I say this only because something “new” pops up every time i reread an owner’s manual, an old favorite recipe hook, etc.