My brother and I (partnering in full time caregiving) are at a loss with how to handle our 96 year old father when he engages in a behavior in a perseverative-repetitive manner for a long period of time. These behaviors are limited to 1-2 a day, for example, praying in morning and reading same page in prayer book for an hour or more, brushing his teeth and-or rinsing his mouth for more than 30 minutes. If my brother or I attempt to stop him and go the logical route by trying to explain to him that he has been performing the action for an excessive amount of time, he becomes livid and seems to be jumpstarted to start the behavior all over again...so we don't know what to do. Any similar experiences, any suggestions? Thank you all in advance.