Baumatic recommend that you regularly remove your soap drawer to clean away any build up of soap residue or mould.
mould build up and soap residue will make your drawer smell
Pull the draw open then push down on the release catch shown here at the top of the draw to allow the draw to be pulled out of the machine.
Once you have taken the draw out clean it with a mild detergent. The fabric conditioner tank cap can be taken off to give the tank and the tube a good clean
turn the draw over and clean the underside making sure that the hole leading to the fabric conditioner draw is clear