Best strategies against trash and vomit buildup on paths?

I have handymen. But how many do I need, because after around a year or two in all hell breaks loose. Theres trash and vomit everywhere and the handymen seem totally incompetent at their job.

What strategies do y’all use against this?
I have already many trash cans, benches especially outside high nausea rides and put the handymen in different zones.