I've been challenging myself to shower without getting any steam on my mirror:
Today I had given myself permission to steam up the mirror because I cleaned the shower & tub and then showered immediately afterwards.
But I've gotten so used to limiting my hot water usage that I managed to get the shower & tub scrubbed squeaky clean and get myself showered off without a bit of steam on the mirror! That was a pleasant surprise. For cleaning, I just filled a bucket with hot water and used that for wetting down the walls and doing all of the rinsing ... didn't have to leave the water running at all.
I noticed a super nice and unanticipated side effect of this steam free challenge ... The entire bathroom stays cleaner and is much easier to clean now! It makes sense ... no muggy, steamy environment in which ickies (that's the scientific name for them, right?) can multiply means a cleaner room.