The problem is we are very very sensitive to rotten food.

Water and soap will do very little to remove any of that if that’s bound itself to the plastic.

You could use a high pH solution to try to tear up any organics. An extended soak in week hydrogen peroxide or a soak in a light lye solution might get the job done.

Ozone, sunlight, retrobrite, barkeeper’s friend, vinegar they’re all trying to do the same thing destroy those organics left on the plastic. But in some cases that stuff just binds and there’s not that much you can do about it.