Last year we installed new teak slides for the companionway hatch cover. We used Teak Guard on them. They looked great most of the summer and the Teak Guard was so easy to use and clean up. By fall, the slides had black in the grooves of the grain. The black could be the usual stuff or accumulated soot from the carferry which blows over the marina twice a day. If you are a Teak Guard user, do you clean your teak with a mild cleaner and recoat each year? Or do you remove the Teak Guard with teak cleaner before recoating?