Although there's a lot of different styles of soap drawers around they all have the same issue and that is the conditioner or fabric softener has to be diluted by the washing machine and then syphons down a very small tube which is normally covered by a plastic housing called the syphon.
In the past this hasn't been much of an issue but nowadays in a bid to reduce packaging fabric softener manufacturers are producing ever more concentrated versions of their conditioners. Some companies are even making ultra concentrated.
The first thing to do is completely clean the soap drawer and syphon (the little plastic bit). This is really easy user maintenance. To do this you need to remove your soap drawer which in most cases as you can see above there is a little button in the middle of the drawer and if you push down there and pull the drawer towards you it should pull free with no problems. Some hotpoint models have a drawer that opens sideways as you can see above and these can be a little more tricky but the full instructions on how to remove this type of drawer are in your user manual.
Now you have your dispenser drawer out.
Now you need to clean the drawer
To do this you just need an old toothbrush or something similar. Clean the top area of the soap drawer paying special attention to the area that would line up with where the conditioner compartment would line up with. This usually has a lot of black gunk that you'll be wanting to remove.
That's it, all done!
Put the drawer back in, put your next wash on and see what happens.
We recommend that you use a standard, none concentrated conditioner however if you want to use concentrated then use tiny amounts and you should find that it doesn't block up anymore or at least less often.