Okay. So you've got some scripts. The stuff you posted earlier is javascript.

You said you don't want to clean the entire database.

But you said you don't want to edit each product manually.
So that means you *do* want to clean all of them in some automated way.

But javascript code such as you've posted is designed to run in the browser. And the browser has no access to the database.
So you need a script to pull each record from the database individually, put it in your browser, and then perform some sort of cleaning on the data, and then send the data back to your store's admin to save the changes back to the database.

Am I correct that you're asking one of us to provide all of that for you?