Upload & Sell: Off
Someone already mentioned setting the temperature for your arena lighting. This sounds necessary with low light and uneven lighting as you shoot through glass.
Our town arena has surge lighting that casts rows of pink ice and the glass not only steals a stop, but also creates a green cast --every which way you point you get a different exposure...all underexposed. So I set my camera for tungsten and bring the images in at 3800K in lightroom and add increased saturation, etc in a preset as I select images to upload. The images must be sharp in-camera. and that's the basic when you shoot fast action in very poor light conditions at high ISO. There's not much choice.
--Another think to check is if you have dirty glass on either side. Snot, blood, sweat, puck grease, mashed chips and gravy, will do it every time.