I had scratchy (really scratchy) volume potentiometers on an old receiver, and I've been trying to clean them with rubbing alcohol, which I now know can damage volume pots because it strips them of any lubrication. After using this, things are much improved, although I'll still eventually have to replace the pots, they're just too far gone in the upper half. I wish it had a way to keep the straw with the can when not in use: any spray product that comes with a straw should have a way to keep the can and straw together (especially when it costs this much). I've learned a lot about the longevity of rubber bands over the years.