You should set the gel in to the box following use and keep it within a neat dry spot. Use interval immediately after opening is all around 3 months; Unopened expiration date is around 2 a long time.(Make sure you NOTE : The cleaning gel can't be cleaned. Never wash https://rowanspgwl.ageeksblog.com/25966385/top-guidelines-of-best-mechanical-keyboard-cleaning-kit