Prolong the Life of Your Strings. Slick up your strings with Planet Waves' XLR8 string lubricant and cleaner. XLR8 is a lubricant/cleaner that prolongs the life of your strings while keeping them and the fretboard clean. If you're looking to kill annoying string noise at your next gig or studio date, this is the stuff. The ergonomic applicator is easy to use and comes with an airtight metal tin to keep it from drying out. Grab the Planet Waves XLR8 string lubricant and cleaner and improve the playability and feel of your strings!