Leave well enough alone | let well enough alone.

Meaning: If you leave well enough alone, or let well enough alone, you don't try to improve or change something that's already good enough.

For example:

• The kids seem happy enough now so let's just leave well enough alone and forget about finding a new school for them.
  
• Unless there's a problem, I'd suggest you just let well enough alone and let your staff get on with their work.
  

Note: "Leave well alone" and "let well alone" are also used, esp. in Australian and British English. 

Variety: This idiom is typically used in American English but may be used in other varieties of English too.

Quick Quiz:

Some staff think we need new packaging for our products, and others think we should leave well enough alone and

change to new packaging go back to older packaging keep the same packaging ENGLISHCLUB.COM

Click for answer c.