This is not an amount question, I will tip what I want to tip, but I mean how do you guys tip the people you don't see. Especially the cleaning lady. Do you just leave it on the bed? In an envelope? How do you write for the cleaning lady in spanish? Do you wait til you see her? What if you tip the wrong cleaner (I assume there's more than one)? Just wondering. I'd like to leave her (or him) something, but want to know what is the best (or proper) way to do it.