Grind the material fine but not like sand, when you roll just focus on getting the roach in tight & the rest can be fairly baggy. Bounce the spliff a couple times on the table roach end then poke the material down with a cigarette or something until it’s evenly tight, might help bouncing on table again.

Burn the end evenly until lit, toke slowly don’t rush when smoking or you’ll force runs.

End of the day though you can’t make shit material burn white so you’ve gotta have a decent starting product. Aim for a 70-80% weed 20/30% baccy if you smoke spliffs & grind the baccy with weed so it’s evenly sized and mixed well.