While everyone's hair is different, it is more dependent on the type of shave creme, foam, gel that you are using. Blades dull from two reasons; the the "hardness" of the hair and the friction and drag against the skin. You want to soften the hair as much as possible, the hotter the water the better, and you want a shave product that provides the most lubrication, or "slip" as possible to reduce friction. Lotions and foams claim to be moisturizing but only a gel or oil will reduce friction the most.
Most guys here on SBG have described all of the trials and tribulations of what they have attempted to get the smoothest and closest shaves possible. If you haven't tried Bald Guyz Shave Gel, become a fan of Bald Guyz on Facebook
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We try to provide products and information to satisfy the needs of those of us who are folliclely challenged.
HBG