I clean nozzle before every print with paper towel and few drops of alcohol, just a quick wipe and its shiny again.
You dont need to put it back in a box, thats crap. But consider building enclosure to avoid wrapping. It also helps if you have clean bed, use brim, use mouse ears if needed, and use glue if you really really need. Make sure your A/C is not blowing directly on the bed or open window etc. But for pla you should be good without any glue, just find better temps and nozzle/bed distance. I print first layer at 60C then I drop it to 55C and I almost always use brim, its super easy to remove it.