I've bought & used the RamAir recharge kit & it is ok but, the cleaner bottle barely has enuff for 1 cleaning, so I bought some of this off ebay:
Weapon-R FOAM Air Filter cleaning solution FREE SHIP LIMITED TIME OFFER | eBay
It works great & it is much easier to use as it sprays on - you can use a lot of it & still have plenty left for probably 10 or more cleanings - i think it cleans more thoroughly since you can use more of it AND it is only $10
Well I don't want to scrub mine & wear the foam down, so this Weapon R cleaner, you just squirt it onto the foam & let it sit 30 minutes, then just rinse out with luke warm water - Y'all go ahead & just wash yours while you're doing the dishes!
probably not since K&N is not made out of foam like the RamAir is
I still use the RamAir oil since they send plenty of it. It's their cleaning fluid that they don't send enuff of.