leave well alone

US /liːv wɛl əˈloʊn/
UK /liːv wɛl əˈloʊn/
"leave well alone" picture
1.

ne pas y toucher, laisser les choses en l'état

to not try to change something that is already satisfactory or working well, because doing so might make it worse

:
The system is working fine, so it's best to leave well alone.
Le système fonctionne bien, il est donc préférable de ne pas y toucher.
I was going to redecorate, but my husband told me to leave well alone.
J'allais redécorer, mais mon mari m'a dit de ne pas y toucher.