Customer had a foul smell coming from sewage ejection pump. We took the basin lid off and took the sewage ejection pump outside and washed it off and cleaned it. After washing it off we installed the sewage ejection pump back in the basin and siliconed around the outside edge of the lid. We let the sewage ejection pump run 5 times and didn’t smell anything anymore. We advised the customer that if smell came back he would have to replace it.