I had originally stopped using these as they didn't leave my face the smoothest. I recently purchased the R41 which quickly taught me the meaning of using "NO PRESSURE" on my face. That technique, once mastered translated back to smoother shaves with my Merkur 34C. So, a couple of days ago I put the med-preps back in the Merkur and voila!!! BBS and no irritation. I guess I must have been a little harsh with my Merkur in the early days of learning to shave with a DE. I am now putting them back in my rotation. Lesson learned.. improved techniques will certainly provide different results from previous trials.