removing a sharkbite !?!

[Use Less]

I need to disconnect a sharkbite from a piece of hard plastic pipe. It connects between pex and this old stuff, and that split open. I tried the little tool, and tried the techniques shown in 3 different videos. No luck. Anybody know how to do this? Frustrated   

[Ken]

If you aren't able to get the sharkbite off, an alternative is to cut out the broken area (and include the sharkbite), then use 2 sharkbites to replace the broken area. Hey, gotta do what you gotta do.