You may have to take it apart. It may be clogged right where the hose attaches to the front cover of the tub.
If there is a music store in the area, stop and pick a trumpet cleaner. They come in all lengths. It is a flexible steel coil with a tiny brush on the end. They are fantastic for cleaning small hose's and clogged drains on refrigerators.
You can use white vinegar to break down some of the gunk.
Sometimes that hose is a bugger to get completely clear. It may seem to be clear, as you can blow threw it, but a lot of crap can still be in there.