Instruct: Classify Amazon reviews into positive or negative sentiment
Query: They changed the formula; now it doesn't work!

I have used Neutrogena T-Gel Extra strenght shampoo for more than 15 years and have recommended it to other people. I liked it because it had 4% coal tar and no fragrance. It was darker than the regular strength T-Gel. Suddenly, sometime in the last year, the shampoo sold as Extra Strength became lighter and had a fragrance; it also started stinging my eyes. I suspected that they simply started making only one strength and put it in the two different bottles in order to keep from losing the market. I contacted one of their reps who called on my Dermatologist's office to push his products, and he denied that Neutrogena had changed its formula for the Extra Strength.Then I noticed that my scalp psoriasis was getting worse and worse. I have now switched to Psoriatrax 5%. It has only been a week and my scalp is much better.If you have used this and have noticed it is less effective than before, try Psoriatrax.