I’ve got Costco KS7 aids, but they are actually Siemens/Signia, so that’s who the domes, receivers, etc. come from.
If there’s wax in the opening of the domes, I just use my fingernail to clean it out.
If there’s wax deeper in there, then I pry off the domes. It’s often impossible to get the wax out of the wax traps, and if so, I replace them. But I have to do this maybe once or twice a year. It’s dead easy.
I don’t replace the domes unless they’re damaged or seriously gross. Which means maybe every two or three months.
I used to be a lot more obsessive about all these cleaning / drying routines, but it doesn’t really seem to make a difference. At night, I try to put the aids someplace where I won’t step on them, basically.
I realize this is all a lot different for CIC aids etc. where the electronics is stuck down inside your ear all day.
One thing I do wonder about is the microphones, especially with the cumulative effects of sweat. But I don’t see anyone fussing over that.