"Don't worry if you made a few mistakes—it's all batel be-shishim." (Glinert)
"...one may not put a small amount of milk into a very large pot of meat, even though the milk will be batel b’shishim." (source)
"Some Rabbis follow the lenient approach and rule that since the fish gelatin is batel b’shishim in the marshmallow, one may mix or cook it with meat, while others rule that bitul b’shishim doesn’t apply to these halachos." (source)
"If ta’am kikar were deoraisa, then if less than a kezayis of treif meat dissolves into soup and is not batel b’shishim, one is chayav for eating a kezayis of soup (without kezayis of treif)." (source)