Spouse and I have a discussion on what to do after you pour a sauce out of a glass bottle. I do nothing but my wife takes her finger and wipes the excess from the bottle before she puts the lid back on. I think touching the food is disgusting and she thinks leaving it there to gum up the lid is disgusting. What do people do?
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I lick it clean before putting it in the fridge.
^^/s
I clean it off. I feel this helps prevent spoilage as the lid will have a better seal on a clean rim than a dirty one.
Wiping with your finger introduces bacteria from your hands and is not a good idea from a food safety perspective. If you wipe the excess you should do it with a clean towel (like a disposable paper towel/napkin) or at a minimum wash your hands. It’s probably not a huge deal if the sauce is very acidic and the remainder will be used promptly but if it’s like a bottle of a condiment that may be used for weeks probably best practice to keep your grubby fingers out of there
You have an immune system for a reason. Hyper cleaning is worse for you as it weakens your immune system.