spring clean 
noun British
A thorough cleaning of a house or room, typically undertaken in spring.We were supposed to be starting a spring clean of the house last night but Debbie wasn't feeling too well so we had to leave that until tonight....
- Clutter may be relative, but it still exists, which means that a good spring clean should be done regularly (regardless of the season).
- Further problems were identified with the decor, which needed freshening up with a coat of paint and the whole place would benefit from a spring clean.
verb
(spring-clean) [with object] Clean (a home or room) thoroughly: it was Veronica who spring-cleaned the flat...
- Diwali, also considered as the unofficial Indian New Year, is a traditional time for spring-cleaning the home and for wearing new clothes.
- In early March of 2002, Miss Natasha Barrow was spring-cleaning her recently purchased flat in Edmonton, North London.
- When Lennox Morrison, a journalist, wanted to spring-clean her life - changing her weight, her career and even her name - she realised it was no job for a well-meaning amateur.