How do I remove this notification "moisture detected"

My galaxy Tab s6 s pen is nolonger doing air actions and doesn't charge. Tried resetting but nothing changed. What might be the problem

Anyone selling this keyboard around South africa and Zimbabwe

Galaxy watch 3 heart rate monitor not functioning on continuous mode. The green light at the back is not blinking. Only works when you select preferred intervals. How can I get it back to function continuous

I've got galaxy note 9 and all of a sudden my fingerprint stopped responding. This is the 2nd time its been doing it. How do I fix this problem?