Wrinkley Leaves?

15 day old seedlings are going a bit wrinkly, are they healthy?
I've been giving them about a cup of water each every 2 days, but my 600W dries the topsoil up pretty quick so I've been dampening it with say 1/4 cup every other day.
Temps are at 81F right now and the surface is pretty damn dry, is slightly damp and inch down though, what is my crime? overwatering, underwatering or hypochondria?
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Whats the humidity level? Do you have a fan blowin directly on it?

My hygrometer isn't working atm, but I imagine humidity is lower than desirable.
Also I do have a fan blowing on em, it's kinda necessary to control temps like this till my upgraded extractor arrives (not long).
Do you think its wind damage? Is it a big deal? Like I say I hope to move the fan off em soon and I figured they're better off windbeaten than overheated...

like Lightening mentioned your relative humidity RH, Which needs to be higher during vegative growth 60-70% range. Peace & happy gardening!