Instruct: Classify Amazon reviews into positive or negative sentiment
Query: previously used / opened

when i opened this product to get ready to use it, i discovered it had been previously opened and there was dried material (looks like dried blood mixed with the powder) around the top rim of the bottle. also, bottle was 1/2 empty ("may" be due to settling, but HIGHLY suspicious because the bottle was NOT sealed and the dried material on the edges!). shipped from amazon and they won't let me return product (returns expiration 2 weeks ago).