The absolutely best results I can get (I know mine is blurry sometimes too, but it's due to my camera) ... I have a Nikon D3200 and I do not photograph it at all. I use the film mode. So if you have a decent camera (cell phone or whatever), do a film of it. You can then use VLC (a free video player) and watch your film there. You can step by step it to a decent photo and then take a snapshot of it. I then crop the extra black out of them with the Paint program from Windows.
But a video file is easier than taking a photo, IMO. Especially cartoons, they usually have one sharp picture, the next blurry or overlapped, then the next sharp again. You need to hit just between the bad pictures and that's not easy with photo. Video by stepping to a frame you think look good and then snapshot it. I do not use VLC myself for this, but it works in it. I use Power Director, which is my editing program for my personal recordings