After a cleaning? Its a good question, but the easy answer is it should look clean.
The funny thing about the kitchen exhaust cleaning industry is it’s one of the only services you will ever get in your restaurant that you have no idea whether or not it was actually done.
If you plumber doesn’t do his job, your pipes are still clogged. If your refrigeration contractor gives you a bill, and your freezer is still broken, you would laugh in his face. Why don’t you check whether your hood cleaner is doing his job? I hate to tell you, but most of them are laughing at YOU!
Take a few minutes after your next hood cleaning service and remove one of the filters. Shine a flashlight up the duct and see if it looks clean.
