Could also say the alcohol hand sanitiser harms the snake I guess
Sorry for the bluntness in asking... But what do you mean?
As an example, alcohol gel is now considered the gold standard in health care for non visibly soiled hands, and evaporates completely in seconds (I know human healthcare is somewhat irrelevant).
It won't harm the snake, but isn't a requirement either.
I'm glad it was mentioned to just feed multiple smaller items above, that's what I've always done. Only an issue if you get a painful snake who won't eat more than one/freaks out if you try putting the second one in its mouth as it finishes the first one to alleviate it not taking it on its own. I've only had one like that...most will happily eat more.
Wouldn't be too worried about the sand, personally.
You could mix it with a coir/Coco peat block, just make sure there's no added fertilizer. I get mine from cheap as chips...much cheaper than Bunnings.
I only suggest this if the sand now makes you anxious or lack of humidity is an issue. It's also cheap.
Another consideration is do not hover over or hesitate about picking the snake up.
When you say it was rubbing it's jaw over you to size you up, what makes you say that?
Did it go to open its mouth or anything? They don't really size up pray until it's dead, since they ambush.
Also sometimes we forget a healthy snake is solid muscle, so holding on to you can feel a bit more "aggressive" than it is, if that makes sense.
Apologies for spelling errors and lack of tact in this post, I am getting a baby to sleep lol.
I mean everything in a friendly manner, just rushing.
Goodluck