KarenJoy, MJ is right about not needing to thicken risotto - do you place it in your thermosaver for 5-10 minutes or leave it in the TM bowl to rest & thicken naturally before serving?
I know this might sound like a stupid question, but do you remove the seal from the lid when you clean? Recently I did a post-sale demo for a lady who had had her TMX for a couple of weeks. I did the self-clean and then when I removed the seal to rinse it off she said "I didn't know you could do that, must remember in future"!!! If you don't remove the seal, food residue can get stuck under it and that will retain a smell.To clean the blades I find the easiest thing to do is remove the blade assembly from the bowl and then use a baby-bottle brush to give it a good cleaning - works a treat.To dry the bowl quickly, give it a quick swirl out with hot water (from the kettle), dry with a clean tea towel, then leave for 30 seconds or so - any residual moisture should quickly evaporate. I do this if I'm going to grind rice, sugar etc. and have just used TMX.And finally, don't forget to keep seal and lid separate when not in use; lets them dry completely - no moisture, no bugs.
I'm wondering why you used a cornflour paste to thicken risotto? Normally, the rice absorbs all the liquid. You may need to check your recipe and use less liquid next time.As far as cleaning, what everyone else has said.