I'm from the Philippines and i was planning to raise my own flock of quail again. as of now i have 4 female quail because the other's were killed by my neighbor's dog , so i ordered new 100 pcs of quails i wanted to raise more quails but buying repeatedly could be more expensive than raising your own chicks. so i wanted to build my own incubator in case that my females are not broody. i watched several videos on how to make one and provided the materials, but i can't find a hygrometer. all hardwares & stores near our area doesn't have a stock. are there anyways, options or alternatives to measure the humidity of my incubator? or do i really need to get that device?