Really? Are you using sushi rice? Once cooked, and we just follow the packet instructions and rice/water ratios, it's the stickiest stuff known to man.
Almost everything we eat is home made, but our desserts rarely are. I need to change that.
We make our own sushi most weeks. It's not difficult and it means your sushi is really fresh, unlike the packets you'd buy from a supermarket. (We're suckers for Yo! though, and can spend a small fortune...