Instruct: Classify Amazon reviews into positive or negative sentiment
Query: don't buy this product

i saw the reviews, and i trust the review and buy the product. however, this is the worst product i never have before. i turned it on and ran over 24 hours in the first day when i got. only one drop in the container. finally, i have to ship the product back, and i need to cover the shipping by myself $11. this is mean i pay $11 for nothing but a lot of time.don't buy this product.