Not many people I know enjoy washing their decorator tips and couplers. Wilton has made a couple of products that make it a little bit easier to wash your tips. And I have a way I do it myself that I like. I first use the tip brush
to push out any remaining buttercream (I hate using my finger, but many people do). I then put them in the dishwasher tip tray
or in the tip/coupler dishwasher bag
and put them on the top shelf of your dishwasher and clean them that way. I tend to use the tip/coupler dishwasher bag the most because it fits both tips and couplers, where as the tray does not, it only fits the tips.
Another way is to use the tip brush, or your finger :) to push out any remaining buttercream and then put your tips in a bowl of HOT soapy water and let them soak for a bit. Do not let them soak overnight or too long, they will start to tarnish. Then rinse them in hot water and set them on a towel to dry.