I switched to DE about a month ago, and at first, I had no problems. Actually, having used carts for several years, I rarely ever had an ingrown hair. I would shave atg all the time with those without any problems except for some razor burn once in a while. Now, I've got about four ingrown hairs and I can't seem to get rid of them. Heck, I got one yesterday and I didn't even shave yesterday...it just showed up last night! I know it's probably technique, but why would one blade cause more problems than five at once? This is very frustrating because I love using my DE, but if this continues, I'll go back to the expensive carts.