My slider always worked great, but even smoother with a high quality motorcycle chain spray lube. The lube is reliable in a metal on metal, high speed, moderate temperature, highly polluted, violently wet, dirty environment. It's thin and doesn't evaporate or attract dirt. I use it for a lot more than my moto chain ... door hinges (make sure your squeaky door is plumb otherwise it will swing to where gravity takes it), for what you think is a worn out stiff lock that can be trouble free for years (one squirt in the keyhole does it), on overhead garage door wheels and hinges for MUCH less noise from friction with the track.