I have to say this Kettenreiniger keeps its verbricht and is what I really was important abrasive. Just recently made the bike of my better half tidy clean and this was of course for the chain + chainrings that it had more as necessary. F100 properly sprayed with and leave once and lo and behold, the largest Schmodder went without problems ever gone. Again treated a second time with it and I was excited: D. A top product which I gladly give five stars! and when Dr. Wack's Kettenreiniger should be empty, this is the same order again ;-).
