We removed filter and cleaned everything out. started again a

couple

weeks later

Your post/question doesn't make clear to what "this" is referring. The drips/splotches on bottom of the tub? Is the photo immediately after a cycle is complete? There is also residual sudsing.

What brand/model dishwasher? What is your water source and condition .. municipal or private well? hard? naturally soft? household water softener? What is your detergent choice? Is rinse aid used? Are you needing to refill the rinse aid dispenser more often than in the past? The drips could be rinse aid leaking from the dispenser. Excess rinse aid causes sudsing.

There is a brown powdery residue on the bottom and on the inside of door. we cleaned the filter and n thing else was wrong other them the filter having that powder all over it. once cleaned it worked fine then tennant complained it waa back a couple weeks later. this is public water w no water softener. this is a rental property w new tennant. previous tennant had no issue and said dishwasher worked great

Brown powdery residue is not clearly visible in the photo. Perhaps a photo of it via collecting some from the tub, or from the filter when enough has accumulated, and placing it on a sheet of white paper would clarify the characteristics of the substance.

The change of rental tenants apparently is a factor, which may involve a change of detergent choice, and other operational characteristics such as type of food soils, cycle/option selections, etc.

Residue is likely the new tenant's dishwasher detergent choice (Cascade pods?) not playing well with the water supply and/or dishwasher, which appears to be a Whirlpool.

I suggest they try a different detergent, like Finish. I prefer powder over pods but Finish powder is hard to find.