I'm just getting into straight razor shaving, I bought myself the shavette a month or so ago to get a feel for holding and working with a straight. I had one or two pretty good shaves with it, but it seems like I'm getting alot of irritation. a couple questions.. its probably my angle and I feel like I might be using too much pressure, correct? someone told me that I should replace the blade after every shave, true? but even when I use a brand new 3 blade disposable I get irritation.. I dont know it's just a lil confusing for me.