GOD, why does people always get the wrong impression about Maru lube because they don't use it properly?
Maru lube lasts relatively short, yes, but not as short as most have reported. The reason why people think it drys out ridiculously fast is because they uses the cube non-stop right after lubing (I don't blame them, because the cube feels really nice immediately after lubing). But you're supposed to wait for it to DRY, and the lubricant leaves a layer of silicone residue on the surface that lubricates the cube.
Now, if you continue using the cube without waiting for the lube to dry, the lubricant mixes with the worn-off plastic dusts and creates an undesirable residue that causes a lot of friction when the lubricant drys fully, forcing you to re-lubricate the cube. This is why people thinks Maru lube drys out quickly, because the way they use it renders the lubrication useless when the lube drys completely, which is not how it should've been used.