i shower every day and don't get it. If you get it that fast get it checked
Have to agree. Getting smegma that fast sounds like a medical issue. I can think of a couple of times where I've been sick and didn't get out of bed for a couple of days and I've never seen smegma in my entire life - I assumed it was something you got after weeks, not days.
Shower daily and wash your knob, it's easy most men learn this in childhood.