Remember to put the gel into your box just after use and keep it inside a cool dry location. Use period of time following opening is close to three months; Unopened expiration day is all over two a long time.(You should Observe : The cleaning gel can not be cleaned. https://keyboardcleaningkitnearme76531.bloggerswise.com/32808808/not-known-facts-about-mac-keyboard-cleaning-kit