Get into the habit of wiping the neck down after practice, clean of sweat, dead cells, residue etc. so when you re-apply you start with a clean neck. This stops build up and helps keep the neck in top playing condition. It just occurred to me maybe it has more to do with the fact I wipe down the necks of my basses before, during and after use rather than any of the products I have used over the years. I also keep my hands clean, wash them before playing, and usually inbetween any sets as well, again clean hands means no residue to transfer to the neck.