Moved into a new house about 8 months ago and the upstairs bathroom sink has always had issues. My bf was checking it out and he thinks that the teenagers that lived here before us stuffed a doobie in the overflow hole in the sink. Got some shall we say… ummm, residue and ashes pulled out of it. Even took a vacuum hose to it and got out a ton of ashey water, but it’s still stuffed up. How the heck can it be unplugged? Should we just break down and buy a new sink?