Instruct: Classify Amazon reviews into positive or negative sentiment
Query: toothache

I purchased this item to have with me on hikes in case I need it to get to a dentist. I thought I would experiment first before really needing it. The product did not work. I tried using the material to temporarily cover the tooth and the stuff would not adhere to my teeth. The material just falls off?? I contacted the supplier and they gave me a refund right away which was good. So I am still looking for a product like this to have with me on hikes.