In a CCTV interview, a maintenance person said that j10 cannot be washed by water jet because water might get inside and damage the internal or make internal structure rusty. It really makes people doubt about J10's quality. I saw some videos of washing f16 and f15 with water jet. Looks like there is no such concern.
An article just popped up in
where a F-22 crash was attributed to a lack of proper post-wash maintenance work. Specifically, the tapes that covered sensitive parts of the plane were not removed post wash. Apparently washing most jets require the taping up of certain joints and pressure sensitive equipment - in the F-22 case, the tape covering a pressure sensor was not removed, causing faulty sensor readouts which caused the crash.
A simple explanation could be that within the scope of a on-camera interview, some statements weren't put forward clearly or concisely? If you think it's easy to impart info correctly, you are either very skilled or have never been interviewed before
To reconcile the above, as members have pointed out, these are all-weather jets. But yet, the US all weather jets are documented to require taping over of certain parts prior to washing. Ergo, the maintenance tech in the CCTV interview probably meant that you can't indiscriminately spray a J10 and that you'd need to tape over or hand wash certain parts for the same reason the US does with theirs.
