We can help you, we represent many landlords up and down the front range. The facts you present are not unusual. Your duties WRT notice of increase rent will depend upon the language of your lease and likely customary communication which has been established over the years. I recommend scheduling a free case assessment to discuss the facts of your lease with one of our attorneys. You can schedule a free case assessment 24/7 by calling 303-688-0944 or online at https://calendly.com/case-assessment/case-assessment. At your appointment, we'll meet by phone or video (Zoom), we'll discuss your tenants, concerns, desired results, rights, remedies, the law, the process, timeline, how we can help, costs, etc.