Knock the chunks loose and sweep.

For my own homes, I've damp mopped with disinfectant as well. (Yeah, yeah, anal.)

Do a light sanding with a buffer, using a hard plate. You will knock down high spots, flatten the subfloor, remove dirt and oil.

If necessary, a good installer will do as suggested above.

You don't want to put something like vinyl over most subfloors directly anyhow. The seams will telegraph and even perhaps the surface pattern (if you're using disoriented strand board rather than plywood). Usually a thin lauan goes down first for that.

We swept, used a shop vac, and then damp mopped the subfloor before putting our flooring down (leaving ample time for the sub floor to dry completely). It seemed to do the trick.

What they said for the floor sheathing.

What do the installation instructions say for your vinyl flooring?

The Builder follows the instructions of the contract and general contractor. Are you writing a blog for profit?

Unfortunately... it's !#%ing normal.

Re blog: because your posts are the script of a reality show. The general contractor’s (your husband) job is make sure everything is done correctly. You have admitted, he does not know how to do things and does not read installation instructions. You keep referring to the builder, if your husband is the General Contractor, the builder works for your husband. Problem is: your husband does not know what is required and the builder is not the general contractor. How much money do you think you are saving by not hiring a project manager?

Good luck, your posts are both irritating and entertaining.

Your posts indicate you thought building a house is as easy as hire some subs to do jobs and you will save money, and your experience is counter to that.

Maybe I am irritated because I worked for ~20 years for two different Contractors.

Do you use Statement of Work contracts?