(as) clean as a (new) pin
US /əz kliːn əz ə njuː pɪn/
UK /əz kliːn əz ə njuː pɪn/

1.
blitzsauber, makellos sauber
very clean or neat
:
•
After she finished cleaning, the kitchen was as clean as a new pin.
Nachdem sie mit dem Putzen fertig war, war die Küche blitzsauber.
•
His car is always kept as clean as a new pin.
Sein Auto wird immer blitzsauber gehalten.