Scrubing or Scrubbing: How To spell?
The word Scrubing is misspelled against Scrubbing, which is present continuous of "Scrub"
Scrubbing has double "bb" is mispronounced as "b"Remember double 'BB' in between the strings Scru & ing which should not be misspelled with single 'B'
Wrong Spelling:  Scru-b-ing  Correct Spelling:  Scru-bb-ing 
Check more misspelled words of Scrubbing to spell it correct.