welder recommendations

Seems any kind of spray would cause to draw dirt and sult and grit and cause more problems than it might solve.
I had the cover off my machine recently and I was quite surprised at how much had accumulated in there. And my unit has never been in an industrial setting, been in my home garage since I bought it brand new.
On another note
Our 110powered miller 135 that I mostly use for exhaust work "at" work has been a great machine, don't know an age bit it's at least 10 to as that's how long I've been at that location.
It balled up (birds nested) on me the last time I used it. I'm thinking it's getting to need a new drive roll as I've had to crank the tensioner more and more as time has gone on, I've had slippage problems here and there over the years. For probably the last 6-7 years I'm the only one who ever uses it. We've only ever run 0.023 in it.