This topic is not so trivial as you initially seemed to claim. There are a multitude of factors when it comes to reusing a particulate filtration mask like the N95 variety, which is something I learned when I became an OHS member at my workplace back in 2015. Sanitation and contamination are two significant factors that must be considered when reusing masks. The slightest mishandling can result in the mask's efficacy being compromised, either by touching it with contaminated hands, exposure to dust or moisture, or improper donning methods and storage methods. It's not just a matter of rotating them on a daily basis and chucking them in a paper bag until the next use.
Also, nobody's offended; we're all here discussing the pandemic.