As it turns out, due to cost-cutting or defects, the contacts on the fan tracks in the Type-C connector have a poor protective layer against oxidation and deposits, which causes constant failures.
Actually, here's the solution:
- Take a medium-hard brush with tightly packed bristles. Dip it in a circuit board and chip cleaner. I personally use isopropyl alcohol (Isopropanol);
- Using a brush dipped in a special circuit board and chip cleaner or a suitable alcohol, thoroughly clean the Type-C connector of the fan, which is inserted into the smartphone's port, inside and out (circled in red);
- I could have stopped at the second step, but I decided to try isolating the Type-C fan connector from the air using a silicone cap. It seems to have helped; I haven't needed cleaning for six days now.
