The water from my fridge dispenser tastes โ€œdustyโ€ and I would appreciate help with a solution. Iโ€™m confused because the water from the sink doesnโ€™t taste weird but the fridge does.

Whatโ€™s been done so far: I replaced the copper water line from the pipe to the fridgeโ€™s water line. Flushed vinegar through the line in the fridgeโ€”about a gallon. Replaced the LG water filter Scrubbed the spout where the water comes out from with soap and water.

Any help would be great!