Regarding Gelatinous Cube and Infravision

 So, imagine there's a Gelatinous Cube.

 

As seen in the Monstrous Compendium. 

 

And Jeff Rients says "I suppose, since it lives in the dungeons, where it's often dark and some creatures have infravision, it makes sense that a gelatinous cube can't be seen with infravision". 

Which is enough on the topic, we move on and things go absolutely crazy, you should've been there. 

But I keep thinking, "Yeah, but how does a gelatinous cube hide from infravision?" The simplest answer is "it has room temperature", but where's the fun in that?

So, back to the Monstrous Compendium. The gelatinous cube is a big (10 feet wide) slimy thing that eats carrion and trash, and also living things that it catches. It has paralyzing mucus on the outside and digestive acids on the inside. It has no intelligence to speak of, it's slowed by cold attacks and immune to electricity, and it can be hurt by fire and normal weapons. Which means it's not as transparent to heat as it is to light, right? The heat and cold can affect it. 

Besides, the cube's digestion has to manifest somehow - either the acids breaking down the organic matter inside the cube work with absorbtion of heat, or release of heat. Probably with release, because otherwise it would slow the cube down. Am I thinking too much about the digestive process of a gelatinous cube? Perhaps, but let's carry on. 

Besides the obvious "it's room temperature and I don't care how", what are the ways to hide from thermal imaging? Cover yourself with a heat-absorbing material, which doesn't work when you're a transparent cube and your whole life is about being transparent. Cool yourself down, which isn't helpful when cold slows you down. Or break your silhouette. It's easier to crawl close to a goblin when you don't look to his infravision as a crawling cube, but rather like several spots. Maybe those are delicious cave bats? If the spots are low in the cube, maybe they are equally delicious rats? 

Is it too smart for a zero-intelligence monster? I dunno. Cuttlefish are not smart, but they're the best masters of camouflage among animals. The one colour scheme they prefer - and they can be of any colour at any time - is zebra-like black and white stripes. It breaks the shape. It doesn't feel like you're looking at a single object. You see something, but what is it?

A visually transparent, infrared-striped cube crawling along a corridor? 

That's the way I like to imagine it.