Is that an issue already discussed earlier ?
Extensively
Try, maybe, "fumes" as a search word???
"Hello, I talked to a maintanance engineer the other day who told me about a new method of cleaning the inside of an jet engine ..."
Not sure that it's new... our airline has been using it for decades. For some reason, we did it on a customer aircraft (who normally didn't have it done).. and they were amazed with the improvement in engine performance.
Rgds
NSEU