Has anyone successfully sharpened Solo Comb blades?

[Olliepop]

As title really - on my 2nd set of blades and they've gone blunt so does anyone have any good methods for sharpening them?
Thanks.

 

[Copperpot]

I've never actually tried. I always end up buying new ones. They seem to blunt really quickly too

 

[Olliepop]

I know I think my last new set of blades was about £8. They always go blunt at inconvenient moments too. Ol has about 1/4 of his mane a different length to the rest at the moment hence the question!

 

[Lu1]

I'd love to know aswell as i have to keep buying new ones everytime! x