New use to clean outdoor solar pathway lights
Not sure if anyone else already figured this out, but I found out that these work great on the plastic solar powered lawn lights. Where the solar panels get discolored by hard water (my sprinklers use city well water).  They take off the calcium like layer and look close to new again. I replace the rechargeable battery, and get another year or two out of the walk way lights. :-)
Rating: 5 stars