Third. It may be a question about belief

Sometimes what looks like dryness is a question underneath it. Not I feel nothing, but I am not sure this is true.

That is a different thing and it does not respond to being treated as dryness. Setting a floor will not touch it, and neither will more of the same practice.

It goes to somebody who can sit with a real question without being frightened by it. A scholar or a teacher who will hear the question as a question rather than as a symptom. Those people exist and they are worth finding, and being asked something difficult does not offend them.

Worth saying separately: if the thoughts about God are unwanted, distressing, and arriving against your will, that is the second category above and not this one. Those are not questions. They are intrusions, and they belong with a clinician.