Hello, all. I have a question. I don't know how to clean the drain in my tub. I had a new drain put in. Few months Go. It's the kind that you lift and twist to drain the tub and twist and drop to fill the tub. I suspect there is hair and other gunk that needs to be cleaned out of there as it doesn't drain as fast as it used to. How do I clean it when it appears I can't remove that plug lady?