Dreame d9. Laser distance sensor bumper error. Teardown. Fix it.
For over a year, the hero of our video battled with all kinds of dust and dirt in his house. One fine day, he cleaned it, washed all the dirty parts, wiped all the sensors with isopropyl alcohol (you can also use alcohol), and lo and behold, all it took was another unequal battle for cleanliness, and it began...
I was too lazy to take it to a repair shop, so the repairs were done on the fly, using whatever tools were at hand. I haven't seen any disassembly videos of this particular model, but perhaps someone will find this helpful!
May cleanliness be with you!