Meaning of the word "a new broom sweeps clean, but the old brush knows all the corners" in English

What does "a new broom sweeps clean, but the old brush knows all the corners" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

a new broom sweeps clean, but the old brush knows all the corners

US /ə nuː bruːm swiːps kliːn, bʌt ði oʊld brʌʃ noʊz ɔːl ðə ˈkɔːrnərz/
UK /ə njuː bruːm swiːps kliːn, bʌt ði əʊld brʌʃ nəʊz ɔːl ðə ˈkɔːnəz/
"a new broom sweeps clean, but the old brush knows all the corners" picture

Idiom

a proverb meaning that new leaders or employees often make big changes, but experienced ones have valuable knowledge of how things really work

Example:
The new manager is changing everything, but remember: a new broom sweeps clean, but the old brush knows all the corners.
They hired a young consultant, but they kept the senior advisor because a new broom sweeps clean, but the old brush knows all the corners.