Glasing or Glassing: How To spell?
The word Glasing is misspelled against Glassing, which is present continuous of "Glass"
Glassing has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings gla & ing which should not be misspelled with single 'S'
Wrong Spelling:  gla-s-ing  Correct Spelling:  gla-ss-ing 
Find more wrongly spelled words of Glassing to spell it well.