how to treat nagging in-laws?

First, try to get along with them, while remaining firm on issues that are IMPORTANT. Don't sweat the little things just to win an argument. If you've tried doing this and they are still nagging, inform them gently that they are causing you and your immediate family issues. Sometimes In-laws don't realize they are nagging. They normally want what's best for their son/daughter. Also, gently ask them how would they feel if when they were your age if they're In-laws at the time would say/do what they are saying/doing. Many people can relate when you have them put themselves in the same position.

Some parents have a hard time of relinquishing that authority over their children when they're grown. Many don't realize they are being pushy. But, once you explain it to them, in a calm, not confrontational manner, most can understand. If they are yelling, screaming, not calm....tell them we will discuss this when we all can sit down together and calmly as adults talk about this. Some people get caught up in winning the argument whether right or wrong, and they lose focus of the real issue.

Keep your distance from them.

Avoid long conversations.

Greet them and retreat to a different room.

When they nag...make an excuse to leave.

Do not let their bitter ways infect your soul.

Best wishes

Kill them....

...with niceness.

Make a game out of it if you must. But the meaner they get, the nicer you get. Trust me, they are not going to change.

Move as far away as you can so they can't visit often. And if they get on your nerves when they call tell them you are busy and will call them back only don't...

"Thank you for the input, I'll consider that."

"That is an interesting option, I'll consider that."

"Yes, I imagine some people do that."

Then do whatever you wish.

talk to them, If they care they will understand. If that doesn't work try changing your attitude towards them..

Dont let them get to you...your spouse married you, not them.

depending on what? I ignore mine

It would help if you would be more specific. Thanks.