This is a really good cleaning product, I use it on the bathtub, toilets, sinks and pretty much anything else. I find that if you spray this in a sink and let it sit for 20 minutes that it runs down the drain and actually helps unclog the pipes even though I don't think it's supposed to be used for this. It works better at this particular problem than products that are made for this such as draino, liquid plumber, etc. This works very well on grease and build up dirt.