Nicotine has no bearing on that. As for the alcohol. Maybe a day. Leave the cap on. There is enough headroom for it to evaporate in the bottle.

Nicotine doesn't effect steeping. That's based on the flavors you are using. Alcohol will off gas within a few days

Fresh strawberry will fade if left to breathe, and I often suspect that this is true with other fresh fruits but candied fruits are a different story. I hope your not just using flavorings from a supermarket that contain alot of alcohol, their generally no good. If you just want to pick up something local for convenience, craft stores that carry baking goods often have some known brands like capella or Lorann, you just gotta know what to get. Avoid Wilson's flavorings except for their custard. wilsons is big in these type of stores in Canada.

Liquid Nicotine wholesalers has tfa brand for 1.79 for 1 15ml bottle, I bought like 20 different flavors cuz 1.79 is way cheaper than even Amazon, can't wait to try the sweedish fish flavor. Since the bans, diy getting very popular very fast so if I were u I would shop around and buy what u need while they are still cheap.

Steeping confuses me too cuz I made some with baked cinnamon and cream from liquid Barn last week and I read that disert type flavors have to steep for up to 4 weeks but I can't taste fruit much rn so I tried it after only like 5 days and it tastes just like a cinnamon roll. I'm also sceptical about leaving the top off for a long time while steeping especially if it's for weeks at a time because alcohol evaporates really fast so for the most part so all the flavor will go right out the top too. But I have very little experience diy , I am new to this myself.

Is that just standard for all vape flavors or is 3 hrs just for a certain type? I'm hoping this vapers tongue problem goes away soon cuz I miss the candy flavors.