I've got the common sense items such as clean the lint trap, report leaks ect.

One of my friends uses comped quarterly cleaning as their inspection day and trains the cleaners to take photos and videos of everything.

Wholesaler had it for $90k "as-is", another wholesaler bought it, cleaned it out, and relisted it for $120k.

We have a few of these (not this brand but they are all the same IMHO) and they will help keep the sofas clean$89.90 - uhome 8.5qt Stand Mixer - https://www.walmart.com/ip/uhomepro-8-5QT-Stand-Mixer-Home-C...This is intriguing to me.

I would add that you can go a long way just having some clean color schemes (two wall colors and one trim color will do almost any house) and a few tasteful accent pieces. 

Will you lose money on the clean? 

I don't know of an inspector but I do have a great electrician, handyman and clean-out crew if any of those would be helpful! 

As the owner of the tree, it’s almost always your responsibility for clean-up and debris removal.

When I look for my next property, I work on cleaning up credit, so my scores are as good as I can get them.  

Attention to detail is a big one for me, make sure when they wrap up jobs they do the right work and finish the job clean without having a ton of stuff missing