Yes dishwasher gaskets will crack and dry up they need to be used or they can become damaged by lack of use but 1 month generally won't cause it, it's usually multiple months where people go on vacation for a very long time. The most common gasket replaced is the door gasket by the average person that knows nothing about why the leak is happening they just assume that's the problem. Door leaks are usually caused by the unit not being leveled all the way around after being installed it may not happen at first but eventually it will. Also one gasket that's always overlooked and a big cause of most leaks is the door wipe which is actually underneath the door. Things that will cause a leak: a bent door, a machine that's not level, bad door hinges, a stick float switch, a broken or stuck spray arm, a cracked tub seal on a stainless steel unit, leaking hoses, leaking sump pump gasket, and any motor piece connection underneath unit, a soap dispensor inside the door broken. These are the many things that can cause leaks. Call an appliance repairman to get something in writing for your problem because insurance companies are only rich because they like to screw the consumers.

You're very welcome. You owe me a beer if you ever make it to Humboldt county.