I Am Having 2 Yrs Old Kid Still Breast Feeding.

i am having 2 yrs old kid still breast feeding. for stoping my sis n law sugested femite. today i tried for the whole day he s crying without sleep. i washed with soap .so many times but still the bitter taste s der. tell me a solution to change it immediatly. i cant see him crying like tis. just nw somehow managed and made him sleep . but in between he ll wake up and ll feed b4 tat i want to change the taste. pls let me immediately