spring-cleaning
US /ˈsprɪŋˌkliːnɪŋ/
UK /ˈsprɪŋˌkliːnɪŋ/

1.
a thorough cleaning of a house or room, typically carried out in spring
:
•
We do a full spring-cleaning every year.
•
It's time for some serious spring-cleaning.
2.
a thorough clearing out or reorganization of something, especially to remove unwanted items
:
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The company is undergoing a major spring-cleaning of its old files.
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We need to do some spring-cleaning of our outdated policies.