I received this as a birthday present though I had been looking at them for...

I received this as a birthday present though I had been looking at them for some time. Really happy with the way it cleans my makeup brushes and the way they are ready for reuse straight away. However, I am disappointed as two of my most used brushes cannot be cleaned as they are too small for the largest cuff but too big for the next one down, I have tried wrapping a rubber band round the handle to bulk it out and get it to grip but this does not work. An adjustable gripper would probably work but for now I will have to stick to washing these two brushes the old way, very frustrating.