Claire,
 CC> The filter in an envirocaire is a true HEPA filter - doubt that is what
 CC> anyone uses in their cars.
Next time you are looking at your carberator see if you can't see the 
similiarity.
 CC> of cockatoo dust and turns white.  Beating on the nearest tree trunk
 CC> removes lots of the dust (looks almost black again) and gives the
 CC> impression you are starting over.
Since I can't tolerate all that dust at one time I just give it a going over 
with the shop vac. Same with the AC filter. Besides, I'm usually standing 
down 
wind...hack, sputter, sneeze, cough.
--- PPoint 1.92
---------------