Solid Hardwood, Engineered and Laminate Flooring - How to Fix Soft Spots in Laminate Flooring?

I just finished having my kitchen remodeled and I had Kahrs laminate flooring laid in the kitchen (I only went with Kahrs because it was laid elsewhere and the new stuff joins with the old stuff). Anyway, the flooring crew used self-levelor in a few places that were not flat. Those came out fine and the flooring is solid in those places. After walking on the entire floor for the last couple of weeks, there are a couple more places that flex when you step on them and they are in well-traveled areas, not hidden in a corner somewhere. For various reasons having the flooring contractor come back is not an option.

Is there any way to somehow fill these spots without lifting up the flooring, leveling it, and relaying the flooring? I don't know if I remember reading this once, or if I dreamed it, but can I drill a small hole in the flooring, directly above the soft spot, and then spray into the hole some of that foam insulation in a can? I read/dreamed that this stuff dries very hard. I would then fill the small hole. This whole idea may sound goofy, but if someone could tell me if this would work or if there is anything else I could try, it would be greatly appreciated.

Wow, you ARE a Warrior! :) :D

I guess that would work, but is it worth the filled hole?

Warrior,
Two things to think about using the foam insualtion.Spray nozzle is at least 1/4 inch in diameter...thus larger hole. It expands a lot. Better have something to protect that new flooring. If you spray it in and plug the hole, it may expand enough to raise the flooring. Even the new low expansion stuff COULD do this. Suppose you could put vegetable oil around the hole so the insulation doesn't stick and the oil would wipe up. Good luck.