Wrap yours with brown aluminum on the fascia and plastic soffit and your problem is likely solved.

You may not find the pieces, but you may be able to get them made.We craftsmen love to do what we once had to do, before plastic moldings and paint everything ideas.

Here's some BS I'm fixing on my current one - pulled off cheap plastic glued to regular drywall (all water damaged) only to find this awesome string art creation holding everything together.

It was chemical smoke from plastic so the o2 was at 11% he was unconscious.Emts said He was drunk and left stove on than fell asleep and was nearly dead from fumes.

I am guessing this is a plastic or fiberglass tub. 

If you do decide to install bars, you'll need to make sure it meets the state building code.There are bars you can put on the window railing. https://www.homedepot.com/p/Lock-it-Block-it-30-in-High-Impact-Plastic-White-Security-Burglar-Bar-and-Secondary-Window-Lock-2-Pack-LB-0001/206084100It's cheap, but I dont know if your tenant will be satisfied.

Sometimes it helps to dig the outside dirt next to the wall down a few feet and put in plastic so rain runoff doesn't seep in. 

I do use Peroxide on paper towels with plastic over it to bleach out some of the staining.

Go to the big box and buy a roll of the heaviest plastic they sell, it should be 6 mil or thicker. 

They were resistant to every preventative measure, wouldn't even get bedbug mattress covers or clear plastic bags, mostly  just acted annoyed that I wanted to address it and take steps.