I get great second-day hair when I do conditioner-only styling.
If I'm using a hard-hold gel, 2nd day isn't gonna look that good... some of the curls/waves loosen, others don't. It looks a little messy. Sometimes I get compliments on 2nd day gelled hair... I think people sometimes like the wavier/messy hair... it looks more wild or something. But not something I really want every day, if you know what I mean.
You may have better luck w/ second day hair if you rewet and add a jelly type product like FSG. Though I've never tried it, Uncle Funky's Daughter Curly Magic gel gets rave reviews for second day touch-ups, on dry hair too. I've had luck with FSG. I think you could use AVG as well in mild or low dews. I've had some luck with SS CEJ 2nd day touchups... but it all depends on how much product I put in my hair the day before. If it's a lot of product I can't really be adding even more product second day.
I wouldn't be able to re-add leave-in 2nd day. Once the leave-in is there, that's it. More would weigh me down and layers is no bueno. Although, if you have a really light leave-in it might work (like Shescentit Coconut/Vanilla spray, maybe GDLI or KCKT) ... just not the ones I use regularly (SS Caitlin's, SM Curl&Style milk).
F - N/LP - NE - MD -- 2B/C
Tropical climate/high dews routine:
Low-poo: BROO IPA, YTCukes, Original Sprout Natural Shampoo*
RO: G SaS*, SSI Okra*, MillCreek Biotin, EO Keratin
LI: G SaS* or SSI O* or none
Styler: FSG* or Volumax Mega
DT: EVCO (rare)
PT: iagirl's gelatin*, SS PT*
Experimenting with: Ouidad CC gel
* = I love it!
Silicone/Sulfate free since 2010.
iherb discount code: CFN646