I am sorry you have had problem guests. @Albert1844
Just set instant book so only those with previous reviews can instant book. Others will need to send you a request.
Airbnb Help is a good website for basics around managing your listing. Do have a look on there about how the review system works.
When guests book you can ask them vetting questions to make sure they are a good fit.
You should remind your guest of check out arrangements the day before and confirm that prompt check out time is particularly important to allow for Covid cleaning so your cleaners will be arriving at 15 minutes past their check out time.