Don't try it, it doesn't work.
We moved into this rental house (pretty decent overall) last October and noticed a few minor problems, but nothing we couldn't live with. One of the problems was the loose drain cover over the pipe in our shower. (I bet most of you know what's going to happen next.)
A couple of months ago I took M in the shower with me and grabbed a lego (one of the larger one's for 1-year olds) and a couple of other good toys that could get wet. I decided to leave the toys in the shower for next time and didn't think about it again. I have no idea when or how it found its way into the pipe, but a couple of weeks ago our shower started filling up with water at an alarming rate. I used two bottles of Liquid Plumber, but that didn't work, so the rental agency had a plumber come out and take a look. He realized something was inside the pipe when the snake he was using to clear the pipe wouldn't move deeper into it. We found the culprit after finally finding a flashlight that worked.
The lego was stuck at the area of the pipe where it turns, so there was no fear of it moving further down the pipe, but it was already 10 inches down. He said they'd have to have another plumber come out, climb under the house, and cut out the pipe. Ugh. The rental agency said that we would be the ones to pay for it. I said I'd talk with Gluby and call them back.
All of this happened on Wednesday and Thursday. Fast forward to Saturday. After spending $15 at Jerry's buying two-sided adhesive tape for carpet, carpet glue, and a 24 inch claw type thingy (I know, very technical of me), spending two hours trying to figure out how to use these things, and calling our friend Aaron to get other ideas, Gluby saved the day. He found my metal music stand (which I never use), took it apart, heated it up with a fire in our fireplace, and melted the lego. He did this 4 or 5 times. The last time he did it he left it in the lego to cool off and pull out the lego. Here are photos of his handy work.