Not sure where to stick this, so if it's the wrong forum, I apologize.... I have a couple of Lens Pens, some branded Cabelas (from buying scopes there) and a couple others, all basically the same in mechanics, a brush on one end that retracts into the barrell and a inverted mushroom shaped 'wiper' on the other end that has a cap that encloses it. My question is this... Is it possible to add proprietary lens cleaning solution to the wiper and does the wiper need anything like cleaning solution? Also, does the wiper wear out or need cleaning? ...or is this a throw away item after a few uses? I would appreciate some insight.