appointments, formulas, special directions and notes, product labels, phone #'s, email addresses, snail mail address too
What does the fox (Guest) say? maybe you hear "ling, ling, ling, ying a ling"
If that's what you are hearing, you are missing clues like; "My hair is dry, frizzy or dull" write down or have the guest write down the solutions, Make suggestions (prescriptions), keep it or give it to the guest as a take home but write it down and offer the tools (product solutions) assuring each guest looks their best in between visits as well!!
Keep offering solutions & put it in writing!