If down the road you decide to once again try this age old art of shaving with a straight razor that must be stropped and maintained, my offer of working on your razor N/C complete with the shipping offer will still stand.
I do believe that the razor is the culprit but only by testing/rehoning and testing agian will we ever know.
ANYWAY; We can ALL look on the bright side/as you aren't using disposables any more!