Do yourself a favor

Making this a quick one. When you buy cheese, buy a brick. Typically it's a little cheaper and a whole lot better. Those bagged ones are alright (except for that brand in the brown/maroon bag) but it's always better when you shred it yourself. You can pick the right size bits, still get slices for sandwiches and, most importantly, it's more moist. That maroon bag stuff is so dry it doesn't melt, it just crusts over. Get a little satisfaction in your life and grate your own cheeses.

As a bonus tip, did you know you don't have to microwave everything on high? See, those power levels are there for a reason, but our culture made foods to be cooked in 2 minutes, not 2 minutes and 30 seconds. So once you've grated cheese for nachos, or especially if you're still using that bagged grub, nuke it on level 6 or 7 for a little longer. You'll get closer to restaurant quality nachos instead of the kind you always end up with a crusty cheese cap that only sticks to one chip and leaves you with a plate of slightly warm, but naked, tortilla chips.