In the article I read about this, the only the issue the writer had was being disturbed by the occasional sound of chewing in the dead of night. (That, and he would find the gecko in the most unusual places on his walls or ceilings.)
Like you, he always left water out for it.
“was being disturbed by the occasional sound of chewing in the dead of night.”
What are the things, that were being chewed, doing now they are not being chewed?