I work with waste waters.
A very cheap and affordable away to keep anything clean is common hard soap. Lye soap is very good at cleaning without destroying things in the process. I use for washing clothes, floors, walls and even personal hygiene. It won’t leave a nice scent behind but everything will be clean.
Look up in your local market for desinfecting solutions. These are usually dissolved in water to make a solution you can spray over objects and surfaces. You can also spray your shoes with it usually. Being highly concentrated, even a small bottle will make a good amount of solution that may last you for a couple of months. Just prepare it in batches.
If you need to work outside in unsanitary conditions, the best protection is prevention. Use a breathing mask, gloves and cover your skin, especially if you have open wounds. Wear safety glasses, as well. You can also consider buying a full body hazmat suit; there are suits made to be reusable and washable.
Last, you should consider filling a complaint for bad sanitary conditions for the street you live in and approach the building manager for poor hygine in the premises. I sincerely hope this a viable option for you.
Stay safe.
The look on her face is priceless and portrays a single, unmistakeable, message: “You lost a fine opportunity to keep silent but I’ll indulge you”.