Although we've always known that we're supposed to wash our hands and keep our surroundings clean, it's definitely fair to say that it was much easier to do these things half-heartedly before the emergence of the COVID-19 pandemic.
And in addition to giving us a clear and present reason to stay on top of our hygiene practices, it's also made us a lot more conscious of the surfaces we touch every day. While we may have previously guessed that the more public of these surfaces run the risk of making us sick, it's obviously a much greater concern now.
And it's likely this new context and the critical importance of grocery stores in the wake of the pandemic that have led to the popularity of one up-and-coming scientist's TikTok experiment.