I am familiar with the grunge brush - I use them on my bicycles, but I also use a chain cleaner that clamps on the chain and hastens cleaning. I'm about to make an order at JC Whitney, and wondered if anyone is using one of the devices that clamps on the chain to enhance the cleaning process? Are they worth getting? I noticed that one came with a 16oz bottle of cleaner and I believe the cost was around 25 bucks.