The one place we don't tip and I am hearing that you should is when you stay in a hotel. Does anyone here tip the cleaning crew? How much?
Yes you should tip the maids at a hotel.
We always leave $2-5 dollars a night on the pillow depending on where we are staying. Usually our first night we will be a little more generous (we've had good experiences with this). Then depending on the condition of our room we will change the amount left accordingly. The nicer the hotel the bigger the tip generally, but only if the room meets your standards.
The cleaning staff can change so it's good to leave your tip each night instead of just at the end of your stay.
Don't leave a tip on the night stand without a note. They usually won't take the money without a note saying it's for them as you might just have left you spare change there and forgot about it. Usually it's safest to place it on the pillow. But again a quick thank you note removes any question as to who it is for.