#1
I turn it on and sometimes randomly it won't stop crackling. It's brand new, I don't think it's the tubes because it sounds great and it doesn't always happen. I messed with my amp by turning it towards me and touching a few things and it went away.

What is this?
#2
Does it crackle only when your guitar is plugged in? What are you touching that makes the crackle go away? That tells me you have a grounding problem. Try your guitar in a different amp. Try playing on the clean channel. Verify your guitar is grounded properly. Swap some of the preamp tubes around. Check all your cables and pedals etc.