I vacuum about 90% of my jobs. I'm not too concerned about leaving fine particles behind. The customer isn't gonna go behind us with their magnifying glass. They're actually gonna walk right back on it in about 6hrs with their shoes on, or their gonna let their nasty dog lay right back on it that evening, so it's no matter to me
The real reason I Vacuum the carpet is to keep my filters from getting clogged up while I HWE. Because when the filter gets clogged with hair and soil, you lose Valuable suction, which is the cause for the Real problem of wicking, and foul odors, caused by long dry times.
If clogging the filter wasn't an issue, I would never Vacuum the carpet.
So if you're vacuuming every job, bump up your charge by $.05/sq. ft