Were you given a large syringe with a needle? Did Simon say to use a needle, or to put the syringe into the hole? Do you have any flat cotton wool pads? I would be looking at giving it a firm scub (I know that sounds horrible, but necessary) with a wet cotton wool pad. I've got a number of piggies in the vet this afternoon, but once I am home I can see if I can do a video of flushing an abscess. It's a bit awkward, as have no-one to film it, so will have to see how I get on with propping my phone up. I will try my best. In the meantime, give it a good clean with a flat cotton wool pad.