I have checked your video about the cooling box problem.
I should say sorry about it. It is our fault.
If only the cooling box is a leak,maybe our worker have not welded it well. So you can gule the chink or you can weld it again to solve the problem.
pls also follow the operation manual. For the guider,you should also lubricate it.
I am so sorry about it. pls check,any problems,pls feel free to contact me.