Any advice on your procedure would be much appreciated.

And if you are confident in your abilities, as a layman, to perform your own dental work by all means go ahead.

If you use US mail to contact your congressperson, do NOT send it to their DC office - send it to their local office as any mail you send to them in DC will take a month or more to reach them because of security procedures.

There's a national board of insurance (www.naic.org) that monitors this kind of thing so you might want to get some information from them about proper procedure as well as forms to submit complaints against Allstate if they try to stonewall you.

Does anyone have a form that they provide their renters that shows what they have to do when the lease ends and they are leaving (i.e. trash, floors, carpets, general cleaning, etc.) and the costs that will be charged...

So we'll do the additional searches, but as part of a protocol, not standard operating procedure. 

Have you had any major expenses related to covid cleaning procedures and how didn’t you adjust for that?

Does anyone know the basic procedure for doing it in Kern County, California?

This is standard operating procedure for litigation.

I am not familiar with any of the books so comment there, but I do agree with @Ned Carey re: the laws differ so much state-to-state and the procedures county-by-county that you need to find someone who is familiar with the specific jurisdiction in which you plan to invest.