Got a toilet tank lid that sits kind of loosely? One that slides around with a scraping grind, to boot? Toilet-tank lids that don't fit properly can be dangerous if they're bumped and fall off the tank. Plus, the grinding noise of scraping china is vexing, not unlike fingernails on a blackboard. But there is an easy fix if you use this stay-in-place trick: To keep a loose toilet-tank lid from sliding around and to quiet that annoying scraping sound, lift off the lid, set it aside and apply a generous bead of silicone caulk all the way around the top of the toilet-tank rim. Let it fully dry overnight; the new silicone "gasket" will stop the slipping and sliding, and the porcelain grinding. And that's the On The House tip for today.