31st President: Herbert Hoover, 1929 

Mat = 31 (Hoover was the 31st president)

Hoover (vacuum cleaner) = Hoover

Pin-up = 929 = 1929 became president

Sherbet = Herbert

Cleaning a mat (31) isn't the only use of a Hoover (Hoover): some find them so attractive they use them as a pin-up (929 = 1929).

Connect Hoover to Herbert

One of the worst things to Hoover (Hoover) up is sticky sherbet (Herbert) powder.

NOTE:

The way Mammoth Memory remembers Herbert is to think of sherbet.