[CatSkynr]

Clean the motors first, save your money unless you're going for a 2X air movement upgrade, then keep us posted!

I kind of hit this on another thread about the AC blower a while back. The same will apply to the foot-well blowers.

My blower motor was junk when I bought my car. It only worked on high, and then every once in a while it would squeal. I removed the motor and replaced the shaft bushings (lots of slack was found). I found with the use of a file and some Autozone generic plastic bushings, I made a perfect snug match. Then I soaked the motor in Tri-Lube with Teflon and let it drip dry over night. Tri-Lube is a ‘dry lubrication’ (does not remain wet to attract dirt – it dries). You can also get this at gun stores. Wiped it down and ran the motor outboard with a rag close at hand to fling any remaining wet lube, reinstalled and since then for the last 5 or so years never had an issue.

As for electrical contact cleaning, best is electrical contact cleaner (Trichloroethane). You can usually find this at ACE Hardware or your local true-elelctro-nerd-radio-hobby-shops (not radio shack). You can use alcohol (brake cleaner), but it is not near as effective in removing debris and oxidation. Trichloroethane also will not harm plastic, so just as safe as brake cleaner.