I use Trend Bit & Blade Cleaner on my pole saw & bow saws--just like with my woodworking blades. For the minute or two it takes, it sure makes a huge difference. Wish i'd started that decades ago--would have made cutting down the annual Christmas Tree much easier!! Those yard blades all see sap (especially pine), so i usually clean them when i finish for the day and they're ready for the next trip.