Let it thoroughly dry and try it. I'd like to know what you find. I thought the $39 Duke recently acquired did the same shaking water out of it while rinsing. Didn't do it when dry and no longer does. So might have been my imagination.I have a new Duke 3 best. Are the Simpson handles weighted? When I shake the water out of my brush I feel a vibration in the handle.
I did a light tug on the knot and it doesn’t move. If I had set the knot myself I would think it’s a penny moving around.
Could that be a loose weight or should I play it safe and send the brush back while I still can?