You have to take apart the tubular drain pipes located under sink.
It will be fun.Here's some do-it-yourself information to save calling plumber
Take apart tubular pipes and clean them out.
Take a photo of the drain before starting. Take other photo as needed for facebook.
Once pipes are apart, run water or use coat hanger to clean out disposal.
Not necessary to take disposal out.1) Tubular pipes connect to disposal
Each tubular pipe has a nut and washer.
Pipes can be metal with rubber washer.
Pipes can be plastic with plastic washer.
2) Tubular pipes come apart with channels locks
3) You need a bucket to catch the water when you take apart tubular pipes.
Keep towel handy.
4) All tubular pipes that get moved while working under sink have to be taken apart, cleaned and re-assembled. All you do is take them apart, clean them out, clean them up, and re-assemble the same way they came apart.
5) Take a photo of the drain assembly before starting. Always start with the P-trap shown image above. Loosen top nut and lift up nut. Next, loosen tubular pipe that connects to disposal. and see it can lift out of P-trap without moving any of the other pipes. If clog is inside p-trap, then p-trap will have to come off. Try not to move any other drain pipes; any drain pipe that gets moved will start to leak and needs to be taken apart, cleaned and re-assembled.
6) For best results:
After clog is removed,
Clean all tubular pipes and washers before re-assembly. Take photos as you go so you know where each part goes.
Plastic washers are re-used.
Flat part of plastic washer fits against nut, tapered part away from nut.
Rubber washers can be re-used depending on age >> new rubber washers are best.
7) To re-seal tubular pipes first-time every-time, use rectorseal on rubber or plastic washers.
As you are re-assembling, smear healthy amount over entire washer and then tighten the nut.
Wipe off excess on outside of pipe.
Add a comment if you have a problem.