Why bother! Those lube pads are pretty much worthless and not needed. I sell Lincoln, Esab, Hobart/Corex and National Standard weld wires, and every rep from those companies has told me they are not required, and in most cases do more harm than good. Every weld wire manufacturer puts a lubricant on their wire to help feedability, and if you use the lube pads you can actually remove the lube that is their to help feedability. Have you ever used these and noticed a black graphite type substance in the pad?, Guess what that is? Wire Lube! I've had customers use these and have the pad build up with so much lube, then when they start feeding wire the wore can actually pull this lube into the liner. IMO the only time these are ever needed is if a guy has a dirt floor shop, does extreme amounts of arc gouging etc; Don't ever use these on aluminum wires either, as you will really have feeding issues.
My boss was giving me crap a few months ago about all the customers I told not to use these pads, I told him I was there to solve problems, not contribute to them.