I've had a problem with a small patch of ingrown hairs on one cheek since I started DE shaving. I've always used Astra greens. I tried using Rapira's for a few weeks and the ingrowns went away. Now I'm back on the Astra's and the red lumps have returned. It appears the Astra's might be the cause. Does anyone else have experience of certain blades causing ingrowns and others not?