lead by the nose

verb2

1. •
   (figurative) To cause to follow blindly.

   • let him choose well his referendaries , for else he may be led by the nose — 1625
2. •
   (figurative) To lead by example and painstaking explanation, as one might do for remedial teaching.

   • We had to lead some users by the nose because they couldn't understand even the simplest instructions.