I don’t want to risk sounding disgusting, I use a Mach III to shave my face…daily. Now I have a beard, so I don’t shave my whole face. Neck, cheeks … but I get 6 months to a year out of one cartridge on these. Having just replaced, I agree 100% about the lubrication strip.
You can get the cartridges to last quite a while if you strop them (as best you can) and keep them away from moisture when not in use. I have heard of some people just putting them in a tiny glass of mineral oil.
That said for as often as I shave, a couple times a week, I switched to a safety razor and got a sampler of double sided blades years ago. I am just about out of blades now and you can get 100 for like 10$.
> When highly refined, mineral oils do not cause any adverse effects. However, if the petroleum is not highly refined, it may include polycyclic aromatic hydrocarbons (PAHs), which are carcinogenic. This means it may increase the risk of cancer.
> A 2019 article notes that in Europe, companies are only allowed to use mineral oils in cosmetics if they comply with specific purity regulations regarding PAHs. These regulations and safety requirements ensure that the mineral oils go through the refining process to remove any substances that may cause cancer and reduce the presence of PAHs.
> However, according to the Campaign for Safe Cosmetics, the mineral oils used in the United States are not as refined as they are in Europe.
> As a result, people should avoid buying products that contain mineral oil unless the label states that it is fully refined as white petrolatum or white mineral oil. White mineral oil is highly purified and meets specifications to ensure that it is safe to use in over-the-counter products.
I have no idea as I don't use the cartridges myself but I think the point is to keep them away from moisture so a closed container with ethanol or food grade oil or whatever would probably work as well.
