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For the sauce, place the chocolate hazelnut spread, butter, double cream and hazelnut liqueur into a pan over a low heat. Allow the ingredients to melt, stirring occasionally, until combined.

We tested popular shower drain unblockers including Mr Muscle, Ecozone and Buster, as well as a home remedy of bicarbonate soda, salt and vinegar, to see which method dealt with hairballs the quickest ...