This reminds me of the Fabreze man........
I knew a CC who used to give away a bottle of Fabreze after every clean and would ask the home owner to spray the room after the carpet had dried or near dry.
He had cottoned on to the idea that once used she/he would do it every day and become accustomed to the smell, there by
when ever she used it ,smelled it or bought another bottle they would associate it with their carpet being cleaned.
If a friend called round they would comment on how nice and fresh the house smelled of course she felt great about that and in return would say I have just had the carpet cleaned, his referral rate was huge, the largest of any CC I knew at the time.
As an established brand he figured out he could piggy back the enormous awareness brought about by Fabreze and the trigger effect of using it to benefit himself and his business.
He made sure he kept in contact with his customers in the usual manner and he was the go to man when it came time for carpet cleaning again, he became known as the
Fabreze man as many customers told him on a regular basis.
It must have worked because he probably had the largest operation in North London at the time and sold up to a franchise,retired and moved to Spain where he still is today.
He once told me, he never gave out 'own brand' deodorisers "customers don't use them,never remember them and usually push them
and you to the back of the cupboard" why would you when you can piggy back an established brand for free.
Clever chap.