She kind of lost it in "The Buck Swaps Here". Everyone was going kooky over the $100 bill Eduardo found, and it was Frankie who consoled him and told him he could do whatever it was he wanted to do with it. Until she saw that floor cleaning Zamboni, and then she lost it along with everyone else.
I thought it was so funny when she tackled poor Ed and told him that he was the reason she cleaned so much. She seemed possessed.