We are landlords of a condo in Florida. The tenants moved out and left a less than broom clean unit with damages, as well as unauthorized painting behind. We want to keep half of the security deposit($1000) to cover our expenses of repairs and priming/painting. We have sent a certified letter to the former tenant within 30 days of the move out stating our intent to withhold some of the money. They replied via certified letter but offered no counter or acceptance. We replied once again offering the $500 split, so far no response. My question is how long do we have to continue corresponding? The realtor that managed the property(collected rent/commission) is doing nothing to mediate or resolve this issue. What should we do?