Hi Mark,Welcome to JustAnswer!
You are chatting to Pete.
How old is the printer? If you are using new, genuine Epson ink cartridges and they are continuously failing after two weeks of regular use, then perhaps the printhead is no longer working effectively and needs to be replaced.
The low humidity in NM would have more of an effect on the paper and how it is handled by the printer, and you may want to consider a small room humidifier to help improve the overall printing process.