Need robot to continue after fixing the problem

My robot may be in the middle of mopping then has a problem, goes back to base. After fixing the problem,I’m not sure what button to push for it to continue from where it stopped. If I press Clean, it starts the full vacuuming then mopping all over again. Help

My mopping  doesn't  seem to get wet  enough, I have  had it about a month and haven't  used  it 10 times or so , what's up???