Instruct: Classify Amazon reviews into positive or negative sentiment
Query: great cleaner

Purosol has made a solid name for itself in the high tech cleaning world by putting out quality cleaners which are also environmentally sound. This one is no exception.I used this cleaner to clean the lens, filter, and mirror in an SLR, and a few other items. It worked well, leaving no residue, strong odors, streaks, etc. The microfiber cleaning cloth included, while not "lint free," was nonetheless soft and non-abrasive, and worked well on the optics.I've used Puosol products for years and I find no drawbacks or problems with this or any other Purosol product I've used, and recommend them without hesitation.