I have high quality 8mm laminate floor throughout my living room and kitchen. I've installed it twice, yet it won't stay locked. I had it inspected by the manufacturer and was told the problem's due to the room being to cold (I keep the temperature in the high 60's) and too humid (I live on the coast, so yes, it is humid here - 50 to 60 percent). They told me there's nothing they can do. What's my next step?