Chocolate and Plumbing

Hello. I've been having issues with the pipes backing up in the building I'm renting. The plumber pulled a lot of baby wipes out (there's a couple with a new born on the second floor, so that's what was causing the blockage). I'm wondering if I'm adding to the problem by washing my utensils in the 3 bay sink. I don't put a large amount of chocolate down the drain but I do clean my tools in the sink after scraping most of the chocolate off. Any comments about what chocolate does to the plumbing, and is there a correct way to flush it down the drain? Thanks, John