I come to work by bicycle, and during the night shifts I take him to our office. One day he broke the camera and started repairing it right in the office. Since there was no solvent, he wiped the chamber with alcohol before sticking and accidentally poured half a bottle onto the carpet. Alcohol the next day dried and left behind a dark trace of a clean piece of carpet, similar to a stain. A week later, the cleaner tried to wash the "spray", resulting in it increasing in size. I look forward to further developments.