This crevice tool is just what I needed to clean a neglected dryer vent and also under appliances (e.g. fridge, stovetop etc - I always lose things in there!) to clean. So far I've only used the tool to clean under the dryer vent and it's worked great. The flexibility of the crevice tool allowed me to really get into the corners of the vent, but I learned a few things that might be useful to someone else. 1. The tool has 2 holes, one on the tip and one on the side (I've included some photos for illustration, sorry for the lint). The one on the side offers a bit more suction, so I tried aiming that side at the part of the vent I was trying to vacuum. The hole at the top didn't help my efforts very much, but maybe that's because my vacuum doesn't have the highest suction power. 2. The crevice tool is a long narrow tube and in one place it is clogged with a large piece of lint. It was easy to pull out a clump of lint by putting it under the shower faucet with full force. I then let it dry for about a day before trying to use it again (didn't want the lint sticking to it while it was wet). Overall this is a great tool and I am very happy with my purchase!