I use a thing call 1 Second Plumber .. comes in a blue bottle thing and it basically forces a chemical into the water that blows the clog through. I've been using it for years and haven't had to call a plumber since I started using it.
Any good hardware store should have it for about $10 or so. you can use it for sinks / toilets etc...
Any good hardware store should have it for about $10 or so. you can use it for sinks / toilets etc...