I have to agree with Jeff on this one. You really nead to clean the track first, then lube.
Try using a slug with a little bit of a rag wrapped around it. Attach to halyard to raise it up the track and a small line also attach to bring it back down. Coat the rag with something like WD40 and pull it up and down the track as needed to clean. You may need to change rags a few times. When you feel the track is pretty clean, replace rag and now coat with Sailkote, hoist and retrieve a couple times. Should be good to go.
hunter Legend 37 Semper Paratus
Formerly - Tartan 34C Yawl