Im guessing you have the weight resting in your palms/fingers, bending your wrists back as if you cleaned the weight up, right? I guess the only thing I could suggest position the weight across your shoulders and cross your hands over the bar (basically think of folding your arms across your chest, but now with a bar there) . This will take all the stress off your wrists, but at the expense of it now being more on your shoulders. Although as you move up in weight I would personally rather have the weight dispersed across my shoulders then pushing down on my wrists.