soft gingerbread humid climate

(FL)

this was my first time making a gingerbread house and I used the white house chef's gingerbread house recipe. I baked them 6 days ago and they aren't hardening. I have seen that you're supposed to re-bake them if they won't harden, but I burnt one piece and re-baking it doesn't seem like a permanent solution since it's been raining and making it really humid. what do I do?????