removing the lid on the washing machine gives better access to the hose with a old towel under the hose to catch the spillage undo the clip connections and remove hose, poke out the old powder residue/gunge till clear check also the hole that enters the drum(with a torch ) as the blockage could be further down and filled back up the pipe, when happy the pipes are clear reattach pipe and tighten the clips and watch machine fill ,check for leakage,if o k power off and refit the lid .
Better way is to use a wash ball filled with the powder inserted in the drum each wash
wirecutterman, April 2009