You don't need to dry it out, just blow it out and run the paper clip thru it. If you washed it out with water then that is a different story, I have found that just cleaning them doesn't work out for me at all. To make a carto like new again you need to dry burn the coil and you can't do that with 1.7 or any carto that has filler materiel inside because it will just burn up the filler. For me when they quit performing I throw them out.I will let it dry out and try again. In terms of the battery, it actually doesnt do too bad. Two if them easily last me all day. Its all about the size and form factor for me.