WELL YOUR NOT CRAZY I HAD THIS HAPPEN BEFORE.. IT IS SIMPLE. THE PIPE THAT THE DRAIN HOSE FROM THE WASHER GOES INTO NEEDS TO BE SEALED. IAM NOT SURE WHAT CAUSE THIS PROBLEM BUT I KNOW THAT IF YOU GET A GOOD SEAL ARROUND THE PIPE THE SMELL WILL GO AWAY.. THERE ARE A FEW PRODUCTS OUT THERE FOR THIS PROBLEM, THEY ARE TO KEEP THE DRAIN FROM OVER FLOWING BUT WORK GREAT FOR THIS TYPE OF PROBLEM… I BELIEVE THAT THE ARM ON THE P-TRAP IS TO SHORT AND IT MAY SOUND FUNNY BUT IT PUSHES THE WATER SO FAST IT LEAVES ONLY A SMALL AMOUNT OF WATER LEFT TO SEAL THE SEWER GAS.. SO I ADDED A FOOT TO THE PIPE AND SEALED IT .. NO MORE SMELL.. GOOD LUCK YOUR FRIEND THE PIPEXPERT.. P.S. LET ME KNOW HOW IT GOES.
