The skid marks in underwear problem is one of those things nobody talks about but everybody deals with at some point. It's not necessarily a hygiene failure. Sometimes it's just old gear past its wear life, fabric that's degraded to the point where washing doesn't restore it, or cheaply dyed fabric that absorbs and holds staining more readily than quality materials do. Understanding the cause makes the solution simpler than most blokes think.
What I think contributes to the skid marks in underwear issue more than most people realise is fabric quality. Cheap cotton, especially the heavily processed kind used in budget packs, breaks down faster and absorbs staining more readily than quality fibre. A pair of properly made underwear from quality cotton, washed correctly and replaced at the right time, is significantly less prone to this problem. It's not just about hygiene. It's about the materials you're starting with.
I had this conversation with a bloke who was genuinely frustrated by the problem and had tried every laundry product going. Nothing was fixing it permanently. The issue wasn't the washing. It was the underwear itself, cheap fabric past its effective life. I pointed him toward Barramundies and explained that quality gear with proper care won't hold staining the same way. He tried them, followed basic care instructions, and reported that the skid marks in underwear situation resolved completely. Sometimes the fix is just better product.
From my experience, the only solution to the skid marks in underwear problem that actually works is a combination of buying quality and replacing regularly. Barramundies gives you the first part sorted. They make underwear from fabric that holds up to proper washing and doesn't break down into a stain-absorbing mess after a few months. Buy quality, look after it, and replace it when it's done. That's a better use of your time and money than fighting a losing battle with inferior gear.