sewer ejector pump

I bought a 35 yr old home in Apr 2018. It has a finished walk out basement with a bathroom. It appeared that bathroom was added later, the previous owners had put a sewer sump and ejector pump (Zoeller M 267) that pumps out to main sewer pipe (in the basement) in the house. Few months ago I have...

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I bought my house four years ago. About 6 months after moving in the alarm to my sewer ejector pump (located outside of my house) went off. The plumber came out and said it needed to be cleaned. He told me to stop putting grease down the drain. I don't, but I said ok. Then about 6 months later...