Do Gulp go bad ??

[Detour66]

I have been seeing posts on other fishing sites where people say they go through 4 packs of Gulp a day. I asked why and never did get a straight answer. For me I use them for a few drops put them back in the recharge and use another one. I only throw them away if they are chewed up beyond use by the fish. Anyone have any insight on this? Maybe I am missing out on something? Thanks in advance!