Hi, I had a problem with the shimmying wheels on my Bee+. Was sent washers from Bugaboo and they've been working fine for a few months now. But this week the wheels have started to shimmy again. I've changed the washers (Bugaboo sent me 6 so I had some spare) and I will see if they work. I was wondering if anybody else has found that the washers stop fixing the problem after so long?