I use to eat comet cleanser and my family knows but my mother in law still keeps the empty cans in her garage. Does she want to embarrass me or make me feel bad? Or is she just being an evil ?

Since we don't know her, we can't ask her why she keeps them. Have you tried talking to your husband about this?

Why are you worrying about what your mother in law keeps in her own garage. You are making more out of this than you should.

Have you ever asked her why she keeps the empty Comet containers? If you don't know and your wife doesn't know, why trip about it?

Bet you two don't get along that well.

Perhaps to remind you, and help you not do it again.