Vacuuming your piano is part of my standard service call. In some cases (in uprights) and every case (grands) I will even remove the action and all the keys to get in there and inspect your piano as well as vacuum under the keys.
Sometimes we find unusual items. I have found the standard items (pencils, paperclips, Barbie Dolls…) and sometimes even old 45 records or old photographs. In the piano below I found a long lost library card that had been in there for probably close to 10 years! (I think it was still valid…) 😉
Take a look at the difference a few minutes can make!