Instruct: Classify a review as either positive or negative.
Query: Permanent Cigarette Filter

It accumulates excess tar inside filter; but says you only clean it after 7-10 cigarettes. I had to clean it every time I smoked. Otherwise it made a new cigarette have a really bad taste. Besides the tar in the filter looks disgusting. Really makes you see what is going in your lungs. It doesn't fit on all cigarettes either. If you smoke the 120s and some 100s the filter is too big.