When I’m in your store, perhaps in the tile aisle looking at mortar, please do not talk to me about the fact that I can buy a new furnace from you and have it installed. I really don’t care. If I were interested in such a product, you might find me where the heating and cooling products are located. Not in the tile aisle.
Also, the opportune time to talk to me about my water quality would be when I’m in the plumbing aisles looking at water coolers, again, not in the tile aisle.
If I wanted to talk about things I really don’t care about, I’d go to the mall and let the marketing folks accost me there.