Thanks for your comment, I did try hand held UV light earlier to disinfect packages earlier, but the whole operation seemed clumsy as I had to move the package with my hand while disinfecting it, I wasn't really sure on how much time I should focus the light on each side and whether every part of the package got disinfected. It seemed to me like a normal disinfectant liquid did a better job as I could see the disinfectant on the whole package with my eyes.

Are you using a hand held UV light or something better?