I am curious to see how all of you handle customers asking for no-foam. I just cringe every time I get that in an order, but I don't want to insult customers - What is your advice?

2nd question, is it necessary to rinse your portafilter after every use? I thought it was, but one of my coworkers disagrees. She thinks that the small amount of grinds left in the bottom and around the edges doesn't make a difference in taste or quality. Again, I disagree.

Thanks for your input!