A spray bottle filled with WARM water with just a few drops of coconut oil, a bristled detangling brush, always start from the ends by holding them then work your way up slowly but gently. Trust me, works wonders.
Also, make sure to find an appropriate detangler. I was using Aussie brand for years and had extreme fall out. I switched to a more expensive brand without silicones and sulfates and my fallout has cut in half.
WIDE TOOTH COMB is your friend. Too many products are out there on the market claiming the best of the best with weird brushes and sometimes a hefty price tag . I think comb works great for the job. Technique is important.