Pour in a lot of baking soda, then some vinegar, wait and let it foam and dissolve stuff. Helps somewhat. Maybe do it twice or three times.
[deleted]
0 ups, 11y
And also make sure your plumbing can handle it. I did this on my garbage disposal a few times and once the pressure transient blew out the seal at the junction with the main drain because it was all cheap undersized plastic.
Caption this Meme
