Last night I put this, presumably, hand-wash only jumper into a washing machine. On a hand wash cycle, cold water. The machine stopped in the middle of the cycle because the filter was blocked. I left it overnight. This morning, I took the filter out (a minor flood followed). It looked as if someone was trying to stuff a felt hat into it and partially succeeded. The rest of the hat is all over the drum. Mopped the floor. Decided to repeat the rinse. The machine stopped in the middle of the cycle. Took the filter out. Mopped the floor. Took the dripping jumper out to the garden. Washed my hands from fluff. Cleaned more serious fluff from the washer’s drum. Run the rinse. Took the filter out. Mopped the floor. Cleaned some further fluff from the drum. Run the rinse. Checked the jumper. My, this hand wash involves a lot of hand washing. Took the filter out. Mopped the floor.
This reminded me of my early or, indeed, my later days (and nights) in “biocomputing”, now known as “bioinformatics”. True, the machine does something, eventually, but cleaning the mess is left up to you.