I have a fork seal cleaner as well. Different brand (can’t remember off the top of my head) and it’s metal instead of plastic. It has worked well for me in the past. Had a couple of questions from the STM’s methodology.
When removing the dust seals I have never removed the spring/wire o ring before doing it. I just put in the flat blade screwdriver and pop it off. Does this make me a bad mechanic?
When running the seal cleaner around the seal I have never popped of the inner seal circlip (to be honest, I didn’t even really know there was one). Does leaving it in make much difference?
As I said I have successfully cleaned my seals in the past without doing either of these things. Was just wondering if maybe this was because of luck (although I was cautious and careful).
Oh, one last thing. I have never removed the fork leg to do it either. Remove wheel, slide up plastic fork protector, remove dust seal and done. Sometimes I loose a little bit of oil but other times none. I have only had to do it 3 times over various bikes so not an expert or experienced by any means.