sorry to say,but its probably time for a new one.the material used for the cluster lens is a polycarbonate or styrene-acryle-nitrate,more than likely the styrene for cost savings. The haze is probably very fine scratches,and polishing wont fix it. The best way to clean this stuff is to use a soft cloth or old towel with windex, nothing stronger,some cleaners will etch the surface, also dont use Paper towels they are too abrasive on the plastic Good luck
Richard