I think I have a dishcloth in my drain?

I have a garbage disposal and a dishwasher... the sinks dont want to drain and there is water in the bottom of the dishwasher... I am pretty sure there is a dishcloth or something clogging it... Is there any way I can take it apart myself and get it out without having to call a plumber? I did this once before and had to call a plumber... I was at work when he came and didnt see how he took it apart... can anyone help explain what I need to do? Thanks