Covering utensils at night

Q:

1. I have heard that all utensils must be covered at night as sickness or evil can come down. Is this true? If things like the cap of a shampoo bottle is left open by mistake overnight, can it be used?

2. Can the crumbs that collect on the table cloth be dusted down the sink if one does not have access to a garden?

Working for Uber Eats

Q: I am a student who wishes to take up a job with Uber Eats. The job is basically to deliver food which can include haraam food and even alcohol. Uber pays an hourly rate for the delivery service. Is this job permissible?

Killing snakes

Q: Does announcing for 3 days for a snake to leave your house still apply to us today or was it specifically for time when a lot of jinnaat accepted Islam and were in Madina? (In reference to the hadith from Abu Sa'ib from Abu Saeed Al Khudri (Radiyallahu Anhu) in mishkaat).