The vanes are located inside the turbo and can be cleaned using a cleaning solution in situ
https://www.ebay.co.uk/itm/292459335127?_skw=turbo+cleaner&itmmeta=01JC60BMWEXRSD20EMHAM2ZFK6&hash=item4417ef4dd7:g:wcwAAOSwvShajqeM&itmprp=enc%3AAQAJAAAA0HoV3kP08IDx%2BKZ9MfhVJKlEsMwj%2F9Rwy31LfWXY0vu7JPmLf9xI%2B%2BMMJNw2%2BBAV%2FAzGfwovr4g0y%2B3nTHJ4Prps1SHhzuT%2Ff2g2nWknOStqIPX6QYXX8mYiOwrPQZg0rCbLgkZPxW2e%2Bb%2FYuW1DwD1hTh1Pxnmpzlv3q%2Bmbox0A19ibnfkcrcj6SmcyxcJgPmsnqSNrib3vGE5upPP8XDzI8lnokXOTc44%2FUuHtUlQmJoH0yyaUgDzXcWukxhKo4OnzBu0ua0dem9Pz9hohvhw%3D|tkp%3ABlBMUKrOrsDhZA