I’m new to DE shaving and enjoy it, my current use of primarily Stirling and PAA are enjoyable. I bought a Henson Al13 mild and like it, but I seem to be getting a lot of irritation on my neck no matter what blade I use in it. My normal procedure is shower, hot water face rinse, pre-shave oil, lather and WTG, rinse and lather XTG, then same with ATG. I tried the same procedure with a Mach3 cartridge and did not get the irritation. What am I doing wrong?! Thanks in advance.