Anti-theft alarm issue
 

I have had an issue on my 2004 Tibby GT(which love and cherish)for the past several months. When I leave for work in the morning, I am able to disarm the alarm, but when I stop off to get coffee and activate the alarm, it will not disarm normally. At times I have to keep pushing the disarm button w/ no response and I have to openit to try to turn it off inside while the alarm is going off. This does not happen later in the day or when it's not as cold out. I know it's not the battery in the remote because the arm/diaarm light flashes. Any idea why this is happening?