This afternoon, I tuned 2 Schimmel's in the same home. One grand, oh, I don't know about 7'4" or so, the other a vertical T-120 model.
Where the grand was located, remember now, it also went up to 60 degree's here today and was in the 50's yesterday as well, the RH factor was 33%.
If the weather was like it has been, the RH factor probably would have been in the mid 25 % range.
When I walked into the other room to tune the 2nd piano, which was not all that far away from the grand, just through the kitchen area, I discovered that she had just had her carpeting cleaned. The floor was still sopping wet. Consequently, I got my socks SOAKED too.
However, in this room, the RH factor was 54 %!!!
A considerable difference due to cleaning the carpeting in that room.
On top of all that, in raising pitch on this vertical, I broke B-4.
heck of a place for it to break. Wound (pardon the pun) up getting my socks wet, my pants wet, my knee's wet and was not a happy camper by the time I was finished!!!
All in all, don't have carpeting cleaned on the same day as the tuning!!!
I warned her that when the carpeting dried out, the RH would drop and the tuning will go out too... OH WELL!