The other night I was cooking hamburgers and french fries. When I was finished cooking, I forgot that you should not allow grease in the sink, well I got some in the sink and now my drain is completely clogged. I don’t know what to do. I tried getting Liquid Plumber and Draino, but they don’t work. Is there any other tips (besides not pouring grease into the sink ever again)that anyone can help me with before I have to call a plumber?