Can't get off the water with Float Plane
I've been flying a .40 Hobico trainer with floats from Horizon hobby. I have several dozen successul flights. It's powered with an os 52.
Sometimes I can't get airborne. Once on step, the plane just zips down the lake at takeoff speed, but I can't break the water even with full up. This doesn't happen everytime.
I have more of a problem when the water is like glass. The longer the take off attempt, the harder it gets. If I get airborne as soon as I get up to speed, I'm all set. The plane has plenty of power.
I've heard that the water can have a suction effect, whereby the water tension holds it to the water? I once heard that you have to give it "down" elevator and then "up" elevator to break this suction? Is this correct? When I have a light headwind, it's not a problem. Again, it's when the water is dead calm, I have more of a problem.
I usually abort the take off and try again. It's also turned sharpley and flipped over on me too on these high speed attempts that get aborted.
Please advise on proper technique