Creality3D CR-10

[Mooselake]

Print multiples, like 2 or 4.  Those 10mm cubes don't allow enough cooling time between layers even with a fan.

That's pretty much standard advice for small parts, either add something else to the build plate, or print more than one of them.  Some slicers have "cooling towers" (think that's Kisslicer) that'll do the same thing, but then you have something to throw out, might as well throw in something useful, or at least interesting.  Off the top of my head I don't remember what a good minimum layer time is, but it should be pretty easy to google.  It'll vary by type of plastic