Instruct: Classify the given review into positive or negative sentiment.
Query: review update

Being a first time user, I found it very practical and it worked ok (but totally ruined my Tshirt with brown spots!). It works fine but kind of gives me some itching in the area, which goes away after one or two days.I'd like the dye to stay a bit longer.Update: I developed an unbearable itching just when applying the dye, it doesn't go for two or three days. I stopped using the product as I ended out being allergic to it.