Hi Jack, I don't think you can. You may need to reprint with the support selected to touch the build plate. That way it won't print support in the channel
I managed to get it out! I used a 2.5mm2 cable which I stripped partly. Then I bent the tip of the stripped part to act as some sort of hook. I then carefully inserted it and turned it around inside the canal pulling out the support part by part.
Hi Jack, I don't think you can. You may need to reprint with the support selected to touch the build plate. That way it won't print support in the channel