For paying customers:
I grease first to ensure it's not forgotten, inspect as you grease tie rods for play. Then clean with air, ensuring low air pressure on electric drive motors. 100 PSI shop air takes out bearings!
With all dust and grime gone, you can see the truck better. Also, any excess grease hanging out from fresh application will be be blown off. Batteries are to be removed, and bottom cleaned, rollers lubed, water level checked. Most companies do not touch water, even if it's their responsibility. We charge extra. Corroded cables and cells must be cleaned. Drive motor power cables are to be re-torqued, brakes are to be adjusted and truck driven to test all features.
Now a good look is given and any anything that may fail is recorded. Depending on the agreement with customer, small stuff is fixed right away. Major jobs quoted. We paint bottom black, touch up top and clean the truck.

Now for fixed maintenance contract:
Grease, inspect, If allowable to customer, blow electric motors only. Ensure battery rollers are lubed.
No cleaning at all. But anything broken must be fixed right away and manager gives approval if more than $200 or 2 hours labor. No upsell, no preventative repairs allowed. If it rolls, brakes work, it's good to go.
Basically were on the hook for most repairs with these fixed cost contracts, so it's a different level of service to the customer. The factory training on PM's goes out the window