How often do you tip housekeeping?
It depends on the service and guest.
Some are tipped daily for routine service. Some guests tip them at the end of the stay. If any additional request is provided, they are tipped then and there.
Tip according to the service each time or a heavy tip at the end of stay
Its individual tip usually in HK and service charge once in a while from the company.
You should leave a tip for the cleaning staff after each night of your stay, including your last day before you check out. Tipping each day ensures that the person who actually cleaned your room that day receives your thanks.