Thanks to all that responded. I'll give you a little update on the problem.
As suggested, I blew some air into the vent holes and I also removed the "bug screens" I had over the vents. Someone said these could restrict air flow. Anyway, after I cleaned the soot I ran the heater for a couple of days and there appeared to be no problem.
However, I was running the furnace while we were traveled and when we stopped for fuel I noticed a soot problem again. Again I removed the soot and turned off the furnace. After arriving home, I again ran the furnace and after 3 days, no sooting/smudging at all.
I will watch it and see if it continues to be OK.
Again, thanks for all the comments.
Allegro Red 34QFA 2014