I periodically use a miller wire feed welder at work but lately it doesn't work so great.

I am not an ace welder by any means but usually I can weld something if I can position the
workpiece that doesn't embarase me.

We use .035 copper clad wire, a co2/argon mix for shield gas.

I don't get that frying bacon sound while welding but instead get a sound that makes me
think the wire is burning up in flight if that makes sense. I've played with wire speed
and voltage (yes, this thing has voltage instead of current markings).

I used another welder in another part of the shop and the difference was like night and
day. I don't know where to start troubleshooting this thing. Ideas?

Wes