Difference between Clean as a new pin and Clean as a whistle

clean as a new pin—spotlessly clean; very tidy:

• He was always glad to see me in the galley which he kept as clean as a new pin.

clean as a whistle—

1. = clean as a new pin:

• It was not long before the dismal little boarded-up house was as clean as a whistle.

2. said of smth. neatly and skillfully done:

• The dog jumped through the hoop as clean as a whistle.