Bathroom Blocks Away Sink Plughole Unblocker 250ml 1 "Regret - unsuccessful!" Mr Hobson 11 February 2018 After reading the reviews I had great hopes of this stuff clearing my shower plughole which has been slow in draining ( taking 3 to 4 minutes ) for several weeks. Despite following the instructions - and indeed using c.150ml ( no measuring container ) - I'm afraid that this was entirely unsuccessful. I repeated the process 24 hours later - with the remaining 100ml - but again no effect. No idea where I go from here. A note from the team Thank you for your feedback on this product. We're sorry that you’ve not had the desired results with this product, we hope you found a suitable alternative to tackle the problem.