How to get rid of flies in restaurants?

The best and cleanest way to set up a fly-killing lamp indoors ~

There is also your protective measures to do well ~ screens and curtains ~

It's best not to use pesticides ~ it will affect the restaurant ~

Or combine the following methods, it will be more effective.

1. Put a sponge soaked in a few drops of lavender oil on a small dish indoors to drive away flies.

2. Put slices of lemon or onion beside the meat or on the windowsill to drive away flies.

3. Black pepper and brown sugar are mixed in the ratio of 1 2, and then dissolved in milk to become a safe trapping potion.