Tips are always appreciated but not expected. You are always welcome to add a tip to your recurring charge or leave cash. However, don't worry if you don't tip your cleaners they will not do a bad job cleaning your house on their next visit because you did not tip them. Your cleaners always aim to provide the highest quality cleaning to you.
Customarily, leaving a small gratuity for each cleaning is common. The typical amount is $10 to $20 per visit, although all amounts are always appreciated.