How do you even work like that? I'd get lost in my own file after like two days. That boss must have had the patience of a saint for a whole year.

Why does this same lazy thinking cause so many home repair fails?

Just dump the grounds into your trash or compost bin first... every single time. The sink drain can't handle that much solid stuff even with a garbage disposal. I learned the hard way after a plumber told me the grounds mix with grease and turn into a concrete-like clog further down the pipe. Now I just tap the press over the kitchen trash can before I rinse it, and it's never been a problem since.