When you first move into the compound they will spray if you request but afterwards and this is a fact, they will only come to respray if you push for it. Good compounds spray internally and externally every month but many don't bother. Obviously even the best kept compounds get the odd one and regardless of what precautions you take if your neighbours don't do the same you are bound to get them. People use the excuse "you'l always get them in this climate" rubbish! There is no excuse for having roaches in your house! There are preventive ways of keeping them down the drains!! Good luck