RC Nitro Engine Glow plug Cleaning using ultrasonic cleaner and diesel

I have alot of fouled glow plugs I wanted to try and recover. I designed some holders on fusion 360 if you have a 3D printer. Link is down below.

Ultrasonic Cleaner is this video
https://www.amazon.com/gp/product/B075FTFD3R/ref=as_li_tl?ie=UTF8&tag=fintechcomm0f-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=B075FTFD3R&linkId=9f3399c8037d53030c1f9eeeb5d9f51b

Multimeter used in this video
https://www.amazon.com/gp/product/B07P7V3YNT/ref=as_li_tl?ie=UTF8&tag=fintechcomm0f-20&camp=1789&creative=9325&linkCode=as2&creativeASIN=B07P7V3YNT&linkId=0e5d19b48a4652cda5bf56ffbcf95662