Michael's advise is very sound, I'd also check the type of rice you used.
Perhaps was short grain suitable for risotto (more starchy)?, if I where you I'd also check the thermostat on the appliance.
I prepare rice the same way as Michael does, using a Stainless Steel pan, the rice never sitcks even when I prepare risotto and don't wash the rice. The only thing I must do is heat up the pan thoroughly, add the oil and swirl the pan to get an even coating on all surfaces. I don't use a rice cooker.
Since you said there are two pots, have you check with your roomate? Perhaps one of the pots was used incorrectly? Perhaps one of the pots has a manufacturing flaw?
"Tell me what you eat, and I will tell you what you are" Anthelme Brillat-Savarin