 And a lot of the commercial blowers out there have a really big needle on it, and it's really much too big. So the next time you go to the dentist, ask your dentist for a dental syringe. They have really, really fine little needles on them, and they're perfect for just putting a little puff of air into that crawler before you drop it down. It makes a huge difference because that crawler is up nice and high, very visible.