ones a week
Depending on how often you are wearing your watch should determine how often you should clean it although most watches will function fine without regular cleaning.
You should make sure that its in a clean place but you should clean it every few days
You should clean your Clarinet every time you play in it.
You should clean it everyday that you use it.
you should really clean your horses stall from 3-6 days of the week.
Yes, but only in very small portions and not very often. Celery is a little to high in oxalates for turtles to handle on a regular basis.
It depends on how much you use it, if your a regular user then every couple of 2-3 months or so.
When you have a spa used by the public you want to drain it often. The water in the spa should always be clear and clean.
Once a month
once a week.
daily
There is no requirement that they ever do it. The body keeps itself clean.