Indolium cooker cleaning?

Hi all,

I have an Induction bottom Indolium pressure cooker and whenever I cook rice in a vessel in the cooker, the bottom turns black and it gets very difficult to remove the stain. Is there any way to avoid this issue? I have noticed this not happening with my mom's silver cooker. I am planning to buy a new cooker (not induction based), which material should I go for and how to avoid the stain? Kindly advice.

Thanks!