My question involves labor and employment law for the state of: Florida

I am a massage therapist in Florida. My spa has instituted a policy of withholding cash tips past the end of our shifts until a front desk person can "inspect" the rooms to make sure they are cleaned and stocked. Can my employer legally require me to stay past the end of a shift for this reason in order to receive my tips? If I choose to leave and collect my tips on my next shift, can they legally withhold my tips from the previous work day until the end of that next shift?