Stench from my Bosh Dishwasher

OK..so…unless I run my Bosch dishwasher on a daily basis…an unbeleivable stench come from somewhere in the dishwasher. Someone told me that maybe it’s the filter, which apparently should be changed yearly. I moved into my house 5 years ago and have never chnaged any filter. Any suggestions or advice. My wife is ready to throw me and the dishwasher out of the house!

Do you have an air gap installed on top of the sink for the dishwasher drain line? That stench comes from the house drainage.

Gene.