Is it related to the dry weather that the viola tuning stick is not allowed? If so, how to solve it quickly? What if it can't be solved quickly

No, one of the reasons why the tune can't be adjusted correctly is that there is a problem with hearing, and the other is that the tuning rod is easy to loosen. The former can be solved by buying a tuner, and the latter can take some school chalk or rosin for wiping the bow and grind a little powder on the tuning rod, which will never loosen. Remember less, or you may never be able to tune it out again _ (:з∞) _