I recently dyed my hair semi-perblokeent black ova naturally blonde hair. is there anything i can do 2 go bk?

Diy or cheaply!wot wld happen if i continuously washed it? it said it lasts up to 24 washes n since then i have washed it about 10 times. r there any random products that could assist? i have been told that fairy liquid could help??? any ideas?
Answer
No. it may fade to a nice shade of greenish brown.