I have an RN4081 NPro, and I have heard people talk about feeling that the cleaning cycle is useless. Well, my battery futzed up yesterday and I got to take it apart and learn all about how it works. Now I'm not sure if this is possible without the ability to edit the data on the chip, but it it possible to FORCE a cleaning cycle before the requisite 1500 puffs? I know that by playing with the jumpers I was able to activate several LED patterns, but that's all I managed.