I had a txt from a customer this morning saying thank you for cleaning their windows but they wont be needing my services again. Thing is, i had only done the 1st clean, almost a month ago!. I did compose a slightly acidic reply, along the lines of wasting my time, and if i had known she only wanted one clean, i wouldnt have done it, but in the end, i just deleted it!. After all, there is nothing to gain in my being nasty about it, its just one of those things. Just forget 'em, and move on.