I have a 5 small mesh bags (for laundry). I fill them with small plastic toys. Put them on the rocks in the dishwasher (making sure the toys inside are lying so they don't fill up with water). I add a small amount of dishwasher detergent and run it on a short cycle. The hot water and heat should be enough to kill most germs.

Once done I shake them over the sink to get rid of excess water and then air dry.

Larger plastic toys go in the dishwasher without the bags. I don't do this all that often. It will take the stickers off some toys.

In the daycares we used to run all the toys through the sterilizer that washed all the dishes. Fast and effective.