How to slove the clogged sink.

I' having a problem sink clogged. All efforts have been made .. use pumps, rubber pipes, stick with wood but everything does not work. Finally I used the old way of using banana leaves. Did what happened .. my problem can be solved easily. The crumb was crushed but it did not cause it to break. Finally the waste that became the clogged cause went out easily. Apparently without capital, the old way is also effective.