Drain Bathroom

Drain clogged toilet …. How I can solve this problem without a plumber – liquid or otherwise?
I have a slow drain bath drain to be fixed and I can not afford a plumber at this time. I do not want to use liquid plumber because I have used in the past and has caused some problems. Ideas?
Home Depot sells something called ZIPSTRIP for about $ 1.00 to $ 2.00. It is a small piece of plastic over two and a half feet long and an inch wide. Its barbed wire to when you press it and pull it clings to your commands.