You can unblock blocked drains through various methods. But one of the most sought solutions is pouring boiling water in one end. For a more accurate result, you can put one cup of vinegar with one cup of bicarbonate soda. This is the most sought home remedy for unclogging the drain.
However, there are some tools for removing dirt accumulations from the drain by using a plunger. If you want a detailed result, use a vacuum to catch all the dirt. Apart from all these DIY and home-based solutions, you can hire any professional drainage cleaning expert in your locality.