hey everyone! i’m currently looking for some parenting tips! how do you deal with siblings fighting? what discipline or tactics

do you find most successful? i know that keeping the peace all the time would be impossible but my 6 year old and 3.5 year old are constantly at each other! my oldest likes to be mean and pester for no reason, and my daughter screams and cry and treats sharing like its pulling teeth. they are driving me nuts this morning with a newborn and very sick husband 😅😅😅

so what do you do to help resolve conflict with the littles? thanks!😊