A family member thought it was a good idea to put orange peels down our garbage disposal; now the kitchen sink drain very slowly. All the pipes were taken apart and everything is clear. In addition, the garbage disposal is working and is only 2 years old. Any ideas on what it could be...
Trying not to call a plumber.

Orange peel should be OK in a disposer, unless it flattened under a blade.
When you run the disposer, it all goes right down?
You could have a clog under the floor at the first bend.

When mine wore out it kept working but wasn't grinding up much of anything.
I took it out and said no more.
I compost.
And there's a lot more room under the sink, I can get to the trap, and I wonder why I didn't get rid of it sooner.