That boiling frog effect. You do the day by day, not really noticing the incremental degradation, and without really being able to point at
when something's functionally ruined, or very close to it.
Just cleaned out the shower head, took a needle to the little holes and knocked out the stuff that had encrusted in it over the half year to a year since it was last cleaned out. Thing went from rapidly approaching outright broken* to bloody close to friggin' perfect. Still leaks a little, but it's dripping instead of shooting, and the water output has gone from functional but kinda' eh to borderline bliss. I actually feel kinda' bad coming out because it felt so much better I stayed in too long, with water a bit too hot. Even the heating aspect is less finicky, damnit ;_;
I've done this before (though, to be fair, before I did the last time the thing hadn't been cleaned out for... probably three or four years, at a minimum) and had it happen before, but it's really stark when the difference is so... clearly displayed. Friggin' maintenance, how does it even work
*Forcibly leaking from areas to the point it was dousing the wall outside the shower regardless of which direction you pointed it, half way barely putting out water on most of it, and in points putting out streams strong enough it kinda' hurt, etc., etc.