Yes multiple exposures are always better with mones. Especially when you wear them around people you already know for a while - you might have to work a bit longer and back your mone signature up with congruent behaviour in order to make the changed impression last. I personally believe rewiring someone’s feelings IS possible. However pheromones ALONE will not do this for you… You have to behave in an attractive way as well.
Look up some threads on congruency on the forum: like this one.
Hope this helps.