Hi Joseph. Wow, 19 months and no dreads yet. It must be your selsun blue shampoo. Almost all anti dandruff shampoos leave residues which will build up in the hair and they also condition which restricts the dreading process. Use the search tab at the top of this site and type in dandruff, you will find many recipes which will help you and also allow your hair to dread. Many herbs treat dandruff, especially teatree oil and rosemary oil. Make sure to wash every 2-3 days to keep your natural body oil off your hair or the knots that form may slip out. Good luck and keep us posted on your process.