Anyone know of any new products on the market to clean or put on the rubber feed belt to get better grip?
I know the manual says to wipe your belt with a solution of I believe 15% alcohol and water.
I just thought maybe with the fast pace of technology there might be some product that I am unaware of to apply.

I picked up a used sander that had a slippery belt. Alcohol made no difference. I scuffed the belt with a random orbital and 120 grit to get through the accumulated crud. This by itself helped helped somewhat, but wiping down with lacquer thinner afterward really did the trick.

This is not the same problem as yours, but the rubber finally fell apart on the drive wheel on my edge sander about 5 years ago. I contacted the only company that I knew which did replacements. They told me 2 months wait time, but I really needed it bad at the moment.

So I cleaned up the core good, then sprayed 4 ~5 coats of high strength contact cement, letting it dry between coats, then finally rubbing it down with my hands to smooth it out after the final coat dried. Not only did it get me through the pinch, I haven't bothered to change it. I'll bet if you sanded as Jared suggested then cleaned with lacquer thinner before spraying with contact, you would get the grip your after.
Cheap Fast and easy, what more could you ask for?

Have you tried " dressing the belt" by raising it very slowly into the sand paper while running? This is how it used to be done as feed belt surface became dry and unpileable sp?

I use Simple Green on a Makita Super Surfacer I have and works well.

Dressing the conveyor is the best way to make it grippy. This involves using a 60 or 80 grit belt and lightly sanding the conveyor to flatten it.

Never use anything but a drum for this process. Pull the platen. You must also make sure the drum is parallel to the bed before dressing. Any deviation in height will dress the conveyor more on one side.

I do not recommend any chemicals on the rubber. Liquids penetrate the rubber and bring oxygen deeper into the rubber. It almost always results in a hard crusty conveyor over time.

Scuffing every few months with some 120 on a orbital sander works pretty well too. Just a light scuff.

Typically the only way to definitively solve that issue is to redress the belt. This usually entials making sure the calibration drum is dead nuts parallel to the table, installing a 100 grit belt, marking the feed mat with yellow crayon and closing the machine to the point where the calibraton drum just kisses the belts and starts scuffing off the yellow crayon mark, you close 1/10th of a millimeter at a time until all the crayon marks are gone and then your feed mat will have grip like it was new. Not something Id try with out having a pro on site to do that, if you mess it up you can do a fair amount of damage.