ANY of the semipermanents are going to run when wet. Thats what they do. they fade when they get washed/wet. I've never had a problem with mine when it was dry but i haven't gone vigorously rubbed my head on any white walls either haha. that said, just stom casual leaning, i have never noticed my hair leaving a mark on anything. i use dark towels when i shower and a dark pillowcase (cause it DOES rub off on my pillowcase at night)

the longer its in, the less it does because there is less in your hair to come off. and yeah, i think special effects is best. or raw. i like em both almost equally i think.

if the rest of your hair isnt dark. wrap each blue piece in foil after applying the dye so that it doesnt get on the rest of your hair. i always leave it in for WAY longer than it tells you too. the longer the better it seems. i've even done overnight (with a shower cap on my head)