Whenever I run my garbage disposal it emits a "sewer" smell. I have run orange peels through it, let a paste of baking soda sit in it, filled the sink full of water to flush it. There is nothing stuck in it but it STINKS when ran. Thanks

Try loading the disposal up with 1/2 gallon of bleach at bedtime and let it set overnight. Next morning boil two large pans of water and flush the disposal out with them. Smell all gone now? Good luck, Tom