Having denim soften up as it wears is normal. If you want them to be stiff again, you'll probably have to starch them.
That's right. As you wear them, starch is lost which contributes to loss of rigidity. If you're going to starch them, be careful too! Starch can attract bacteria so your jeans may smell and the bacteria can wear out the denim faster.
With summer my denim smells like ass so i ziploc'd it and now its in my fridge. The thing is that i dont thimknits completely air tight i only habe ome that barely fits my denim and i tried to tape holes. Theres like one or two minor holes. Is this a problem? Leaving them overnight
It should not be a problem! In addition to Technique's comment, regularly airing them out can definitely help to control the smell. You can even stuff febreeze in the pockets and give it a good spray. I've commented about this product before but I have yet to try it; Pure Ayre. Apparently it's an all-natural odour removal spray. The guy who made it even sprayed it in his mouth to show how safe it was...
So two of my Sams were accidentally dryer-washed on maximum settings, resulting in the white stripe down the pants leg where they folded. I know the white stripe is pretty permanent sadly, but is there any way to get rid of the crease? Logically I'd iron it for any fabric other than denim, but something tells me that ironing would make it worse. Thanks.
Ironing out the crease shouldn't pose any problems! If you're still unsure, maybe hanging them up while taking a hot shower with the fans off can steam out the crease if it isn't too defined.