window regulators

[streetstar]

Windows - (both sides and the back hatch) roll down painfully slow - passenger window only rolls down halfway as well.

Do i just nees to sack up and buy new regulators, or is there another solution. I took the inspection panel off the tailgate and the scissor and lift mechanisms were clean. I was going to graphite lube everything, but it didnt really need it. And its still slow and jerky acting

I didnt think electric regulators w "wore out" i always thought they were all or nothing, but maybe i'm wrong. I will order new reg's today if that will fix, but if it won't, is there something else i can do to smooth it out a little?

I am not expecting new Tahoe smoothness, just reliable windows that dont stick or jerk when being used