Is it a ‘thank you for prepping my room’ or ‘please clean my room today’? If you tip post cleaning, it’s likely going to someone else the next day. Many hotels now only do housekeeping on demand. How do employees feel about this - do they miss the tips or are they happy for a less stressful workday?
ETA- I’m in the US. Does the rest of the world tip housekeeping? I always have when traveling because I do at home, but I don’t know what the norm is.
On multi-night stays I tip if I want anything special, like extra coffee, or when my drunk friend destroyed the toilet. The only time I tip when leaving the hotel is if the housekeeper did something above and beyond normal expectations. Like when my wife started early and soiled the sheets. Left a note apologizing, a $20, and just expected fresh sheets. Nope. She replaced all the bedding and the mattress too. Left her another $20 and a thank you note when we checked out.