I have several ESC of one famous brand. When I was flying in the spring, water got into the ESC and it burned down. I opened the ESC and took off all the mosfets with a hair dryer. I bought other mosfets on aliexpress, which were more powerful in terms of characteristics. ESC has become less heated with the new mosfets.I do not recommend buying cheap yellow Chinese ESC: there is no name on all mosfets.I disassemble the new ESC and cover the board with 2 layers of Plastik-71 protective varnish.