How to sharpen or lube old bd express screws...?

Is there any way to lube them for easier screwing potential? So they are less "sticky" Lube the inside as well?...with what? I have sharpened them and taken all the burrs off and they go in.......but not as easy as i remember when they were new...back in 1997!

I use this guy's method. Super sharp results, but it isn't quick your first time.

Screw Sharpening Procedure

Thanks Jason!

I then wipe everything down with a Tuf Cloth to protect and lubricate.

sentrysolutions.com/product…

It's clean, easy, and effective.

It's possible that one or more of the teeth a slightly bent inward. This eliminates the taper on the outside [ slightly larger OD. @ the tooth] and makes them hard or impossible to screw in.

Look straight down the bore from the hanger end. If you can see a tooth tip, its bent.

Thanks guys!