It's unclear what the effect of oral ivermectin (stromectol) and/or oral metronidazole is, because (as far as I know) no one here has taken one of them in isolation. All treatments were combined with Soolantra, and Soolantra by itself has a clear positive effect. (And is safer than those oral meds.)
So I would suggest to only use Soolantra. (Although, for the sake of science, it would be interesting to see what the effect of oral ivermectin or oral metronidazole in isolation would be.)
The liquid isn't really sticky/thick, it is more fluid like, but maybe not as liquid as water. The fluid usually stays at the lesion, often with the lesion continously producing more liquid for about one day. It the lesion is small, than the liquid production is usually low and sometimes barely noticable. If the liquid production is high, than with enough liquid building up, the liquid may flow over the skin by gravity.
The liquid is clear/transparent, often slightly yellow/orange when captures/taken with a white toiletpaper.