A plumber has warned that vinegar ‘can’t unblock drains’ and recommended using a drain snake instead. The plumber, who has dealt with many blocked drains, said that vinegar and baking soda are not effective in unblocking drains, particularly in bathrooms. He said that a drain snake is “far superior” and “works instantly”. Drain snakes can be purchased from Amazon for £8.89, from B&Q for £12.99, or at Wickes for £13.50.