You can't shoot bows several times without oiling them and greasing the string and expect them to hold up
Actually, I haven't waxed my string on my Excals in about 6 months, lol.
Any form of grease is a bad move on the string or the rail. I know some mfgrs require rail lube, but doubt any are grease based.
I have a can of Jig-a-Loo but haven't tried it yet, others speak highly of it.
My experiences w/ Bnett have been less than stellar. Good Luck.