|If you do not want to dry pail (which I would HIGHLY endorse, by the way--really improved my quality of life!), I would not use detergent in your wet pail. I know that ME recommends this in their directions, but the one time I followed that advice in my wet pail (before I switched to a dry pail), my diapers smelled and I had detergent build-up problems (ammonia stink, crazy rash on son).
I also just thought it would be worth mentioning, in case you hadn't already read it on this forum somewhere, that in most cases, you should use no more than half of the recommended amount of detergent in the wash load. Many people find that 1/4-1/3 is even better.
Typically we use way too much detergent anyway (consider how the scoops or cups are set up, even though if you read the directions, for most loads it's only half full; but of course more detergent used is more detergent sold!), but it becomes a problem in a frequently-washed item like a diaper, especially since they are thick and it's harder to fully rinse the detergent out of them.