What you're calling products "getting use to" your hair (as described), could be from build up. Before swearing off those products, you should first try washing your hair with a clarifying shampoo, followed by a quality conditioner (could be a conditioner you're already using). Then, if the products you've been using still don't work the next time you use them, you may the situation Kathy is describing, in which your hair just seems to crave more variety. Then it would be time for further product exploration, keeping in mind your present hair properties and curl type.
Speaking for myself, I usually can go years w/out needing to switch up my routine, but everyone is different.