Use LubeSliders if your main sail sticks when hoisting.
Comes in a pack of three.
This is your best tool when it comes to cleaning and lubricating a flat and narrow mast track. These types of tracks use Sliders to raise and lower the Main Sail. This would be your choice if your track has a rectangular channels which vary in width, but a round barrel or slug wont fit inside. The highly absorbent foam will blow your mind, when you see how much lubrication it holds. Soak one of these disposable applicators for ten minutes and you're all set to hoist it up and down. Slick and ready to sail.
Watch a demo: