Thanks for your post and the video @BadWolf . For my first time around, I just purchased new V-Wheels from Inventables. If it happens again, I’ll try the dismantling of the wheels and try the new washers. My wheels are the original wheels from the original shipped X-Carve. Pretty happy with their life span 
Much appreciated!
UPDATE: I replaced the v-wheels, but turns out I had to tighten up the Z axis belt as well. I’ve noticed there is no ‘bounce’ in the Z anymore. Now it’s running like a tight ship.