This is a very common problem. Softening liquid is rarely all taken into the machine, and what is left in the bottom of the dispenser drawer will thicken up when the machine is left idle. It will not always dissolve (especially the concentrated variety), and will often clog up the small siphon tube at the rear of the compartment. To fix this, just remove the dispenser drawer. The soap drawer has a little plastic piece (usually blue) that pushes the latch that holds it in for the last inch. When you have the soap drawer out, you will need to remove the blue cap from the top of the siphon tube and just pulls off. Clean this part in hot soapy water, along with the drawer itself. If there is a lot of scale around it, use a de-scalar, for example LIMELITE or OUST and a small brush. If there is thickened softener blocking the tube below where the cap goes, try a drinking straw or tooth pick to clear it. Push the siphon cap back in place, but before pushing the dispenser drawer back, check the inside of the machine where it goes, with a bright torch, to see if there is any build-up of soap and mouldy sludge around the spray holes at the top. BIO DETERGENT will often encourage this, but it can be removed with an old toothbrush and hot water. Do a “Maintenance Wash” after this (no clothes and no detergent on COTTON WASH), to clear out any bits that may have dropped into the drum, and it also helps to clear out the hoses. It would not hurt to throw a cup full of washing soda crystals in the drum as well, before the maintenance wash starts.