There are some elderly people who get a little grumpy with their old age. Unfortunately, this behavior becomes the part of their existence and it may perhaps be too late for them to make amendments. However, you can find a way to deal with them.
Step 1: Remember that they are old people and need to be respected regardless their eccentricities and peculiarities. If you think that a senior citizen is being irrationally ill-behaved, make sure that you keep your calm and composure. Respect them always.
Step 2: Control your own temperament while dealing with the cranky senior citizens. It is your own restraints that will help control the situation in a much better way.
Step 3: Do not misjudge the elderly people. Always remember that with old age certain peculiarities come. Perhaps you will also be like this when you will get older. So do not label them as bad or undesirable person. In fact, try to get into their skin and figure out what could be making them behave this way.
Step 4: Try and talk the things out with them. Be very respectful and ask them what is causing them to behave in such a way. Ask them if there is anything you can do to make things more amicable.
Step 5: Sometimes all these senior citizens need is to be heard. So even if they are petulant and rambling angrily, let them speak out their mind. Once they have vented out their anger and frustration, they will calm down and behave appropriately.