What to tell the tenants to prep for selling the home?

[Cathy Malmrose]

I am about to sell 2 quads, 1 duplex and 1 SFR in a small town in Michigan, listing through a regular realtor. I have picked out each of the tenants myself. They have all paid rent through the pandemic and they are all good people. It seems like the best move is to give them a letter explaining that I am selling the properties and they need to clean up any messes and keep their units clean while the homes are being sold.

Advice?