Review on 3-Pack of Genuine DiamondClean Replacement Toothbrush Heads by Philips Sonicare - White, HX6063/64 by Darcy Thorson

I also had problems with the last two batches I bought from Revain. About a third of the heads vibrate very loudly - sometimes after a few weeks of use, sometimes right out of the box. I also noticed that the cluster of blue bristles that fade over time is much smaller on these heads than it used to be. I originally thought Phillips changed the design. But after reading the latest reviews about possible fake heads, I ordered a pack directly from Philips. They look exactly like the heads I was using before these problems started. And they don't make that loud vibrating noise. And they were only a few dollars more expensive. Something suspicious is happening with the Revain product.