Mire than likely it will move to a place it likes mine crawled in a hole for weeks than popped up one day, you can peel him softly if it's foot is visible but if it's in a hole or has it's foot spread into crevaces it would be difficult without harming him . You can make the place he's un now unpleasant and he may move somewhere better by aiming a powerhead in Its direction or blocking it from light to see if it moves closer to it , but monitor it
I'm sure there's other ways but if it's nit in any harm to it's self or others then it will move in time