I don't know how many of you all use them, but came across this that might save a few bucks, although I haven't tried either:

Recharge the butane
http://youtu.be/8dvQeAjv3eg

Recharge the pads

http://forums.bowsite.com/TF/bgforum...13266&forum=36

http://www.ebay.com/itm/151281518665