Gentleman-

I switched over to C.O. Bigelow shaving cream for skin sensitivity to the shaving soap but have noticed that it is leaving a light patina on my blade. It does not wipe off when drying nor does it rub off using a q-tip and water or alcohol. I did have success using a wet q-tip and a touch of tooth paste but it returned the next time I shaved. Razor is a new Dovo Bismark. Thoughts?