I keep getting condensation on the inside of the glass lens cover. The cover can not be removed. Is there anything that can be done to rectify and avoid this in the future. This is the 4 th camera it has happened to. Is there something that can be sprayed in the glass. Don’t think it’s due to rain getting inside as it’s only in one or two spots. The cameras are all in different locations that is has happened to and it isn’t drying up. I have had to replace 3 prior. This on I am hoping someone knows something to fix rather then sending it back. Thanks in advance for any help.