I have been diffusing my hair for years, (I live in MN afer all). I have very thick hair, and I would be drying my hair for hours if I didn't use high heat. The products I put on my hair seem to protect it from heat damage, as my hair never feels fried afterward (I diffuse about 2-3x/wk).

I am always trying to enhance my curls, so I find that starting my diffusing upside down really makes them spring up. It also gives volume at the roots. Then, for a shorter period of time I diffuse standing upright and leaning side to side. However, if I start off drying my hair standing up, and THEN finish drying upside down, I get fuzzy, big triangular hair! I put my ionic hairdryer on high speed/ high heat for about 3/4 of my drying session, and then swith it to a low speed the rest of the time. I find that the longer I wait to diffuse my hair, and let it air dry, the fuzzier or frizzier it seems to get. So, it I'm plopping, I do it 15-20 min. tops to preserve curl definition. I let the bowl of the diffuser scrutch my hair, and I try to touch it as little as possible. I usually stop when hair is about 85% dry. Hopefully that all made sense. Good luck!
2c?/low-med porosity/medium texture
Summer Routine
Co-wash: TJ's TTT condish
Low-Po: SheaMoisture marine complex
Condish: SheaMoisture marine complex
LI: Giovanni Direct
Stylers: Mop Top curling Custard, Curls Gel-Les'C & Biotera gel, BWC spray gel as finisher
Refresh w/: LUSH R&B
DT: Shea Moisture Superfruit 10-in-1 masque, Giovanni Nutrafix reconstuctor, jojoba & argan oils