In case you are interested, this odd tip works. I was making a buttercream and it separated (ok, I was rushing, so sue me) and I had heard that warming the bowl while beating fixed it.
My daughter held the hair dryer on medium setting about 4-5 inches from a heavy ceramic bowl while I beat. I did not rotate the bowl so only one area, about 1/6 of the total probably was warming. In about 4-5 minutes, it came together beautifully.