After all the excellent reviews, I was convinced this would be a step up from my 8 yr old stainless steel sink. I think I made a mistake. The sink was installed yesterday along with new countertops. I thought the smudges were due to some of the adhesive the installers used. I called them back and they were able to use some solution to remove the marks. Today I had a plumber reattach the faucet and disposal. More smudges on the sink. Not in the same place as yesterday. Thinking they might be grease or similar, I tried soapy water and a scotch Brite pad but it didn't help. Then tried Bar Keeper's Friend. That actually made the marks worse. My new sink looks dirty. Help. I want a clean, smudge-free sink. What should I do?