Spilchy- I'll consider the Charlie's APC...heh heh, this experimenting of mine is making them some money
Neothin- It depends on all the variables in your situation (washer, water, stuff on the MFs, etc.) but for me the "special" detergents worked miracles compared to Tide/Cheer/etc.
There are sources that seel large quantities of Charlies quite cheap too.