Vacuum THOROUGHLY with a GOOD vacuum prior to encapping.
Before cleaning: With oil based stains, I use a spotter that will sort these out and is also ENCAP; COMPATIBLE, so it DOES NOT need to be rinsed out with water.
Make sure the encap; product is a good one and does not leave any sticky residue.
Set the handle at a good working height for your body.
Mix ONLY to the recommended solution rate.
Make two passes, one laying down solution, not to heavy, you just want to see a small whitish foam on the carpet.
I most times, "feather" the solution handle, (on-off), rather than holding it on all the time, practice gets this easier and better and it becomes second nature.
The second pass is slower, no solution.
Spots, etc; DO NOT add more juice, keep the Cimex on that spot to scrub it.
With encap; more is not always better, plus you risk over-wetting the carpet.
Hope this helps.
Shorty.