Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Impossible to wash

I bought these because they were so pretty and matched the colors in my Fiesta Ware. However, the painted flowers come off at the gentlelist touch when wet, even if they are only wet from condensation of a beverage! I never use them because I can't wash them without the flowers coming off. What a disappointment. I will not ever buy another Block product.