dear all sifu here,may i know what can i apply to protect my laminate?

and for my main door,the laminate got some little air inside,its effect my front door open and close,the door will scratch the flooring,when new install the time with out this problem,the problem only appeal this few week。anyway to fix it?

i try to snap photo before,but the photo look every thing normal.quite hard to explain.

is just like the laminate got some force to push from left and right,and the middle pop uo abit.really just abit.if i step it.can feel the air in side.any way to release the air??