I've had some success with heat http://st162.net/forums/viewtopic.php?f=101&t=6934&start=220 Only way to keep bubbles and cracks away is to keep the dash lubed with Armour-All or Wynns Dash. Once it dries out it starts to bubble and crack
http://st162.net/forums/viewtopic.php?f=101&t=6934&p=90302#p90302 At the bottom of the page, still trying to perfect the article addressing Dash mats do help but it pays to keep the dash lubed, it can't crack if it's moist I bought a dash mat the other day, it's waiting in Oz for me to pick it up. I'll def use it in summer and maybe store it in the winter as there's not much direct sunlight here in winter
I got a DashMat in medium blue a few years ago for my birthday. The dash was already a bit cracked around the vents so I was glad to use it. Vicdat