We got a new efficient toilet installed in one of our bathrooms - a Kohler k-3575. They claim it is practically clog proof. I guess they weren't counting on my kids using it. Anyway, the bottom of the bowl is more rectangular than round and a standard plunger doesn't form a seal. I have tried forcing it further into the bowl with no luck. I tried using an old piece of garden hose in as a snake and that didn't work either. It plugged once before and the clog (too much paper) was close enough to the opening to reach with tongs. Not this time, though. I would really hate to have to call a plumber out for a simple clog; there must be something simple I am not considering.