Time is all that Disney has right now.... They're idle, remember. The parks have more downtime than they ever wanted.
As for virus on conveyors...OK, but so what. Those nasties can be on doors, counters, chairs, toilets, handrails ....EVERYWHERE more or less.
A side note:
The Costco employee at the checkout register to my surprise wiped the conveyor entirely before I placed items on it........she was very thorough wiping the whole cycle. I know because I saw the damp marks from the cleaning product on the whole circuit.