I’ve got one of the China made incubators that I hope someone can help me with. It won’t get hot enough. It won’t get above about 86 degrees. I’ve put 2 brand new heating elements in it but it hasn’t helped a bit. Can you tell me what else I need to look at? It’s like the one in the pic. I don’t know enough about the parts & their function, but I feel like I should look at something else since it’s not changed with 2 new, different heating elements. Thank you in advance!