Old practice used to be to use O2 flow on skin to aide in drying site, with the theory to have oxygen act as a healing agent in terms of vasoconstriction. The problem with high level O2 (100%) is that it can potentially effect the eyes worsening or inducing retinopathy of prematurity. Oxygen is a great medication, but the more we learn about the effects we become more cautious on how liberal we are using it. I personally have found great luck in using prescribed ointment, however the key is to apply a layer of vaseline to the actual diaper so it is unable to wipe off all that precious ointment.