Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: don't try to wash this in washing machine

I purchased the pet bed for my new puppy. I washed it as instructed, and during the process, 2 of the buttons came off, which resulted in making the stuffing in the bed bunch up, now the bed can't be used, which is too bad, as my puppy loved sleeping on it. Very disappointed.