Hello people, the kitchen pipe of my house is clogged, my brother tried to put a thin iron bar with a stocking (calsetin) wrapped in duct tape, the problem is that when I take out the iron bar the half wrapped in duct tape is left stuck inside the pipe and now I get worse, I get stuck and we can't get it out, does anyone have any idea how to get it out ?? They told me to put some acid to dissolve, is that correct? And in that case what acid should I use? I clarify that the pipe is made of PVC, of course thanks.