Cassette Player Panasonic S-XBS fixing | changing rubber belt

Around the year 2003, my Mom bought me this cassette player as a birthday present, and I was so exited about it, cause this product was the most cutting edged one at that time, as the rechageable battery and one add-on-battery power driving, 40 hrs playing duration, lower current noise, automatic tape fliping, the portable size, and the best stereo quality. I use it to enjoy music, share the ear bugs with girl friends, practse English listening until the mp3 came out. 20 years after, I found it won't work cause the rubber belt has rottened. Now I have to cleand and fix it to find my sweet memeries back.