を洗わなくて

not wash …

→ を
phrase Very common #1,776
not wash … The を marks what is being washed. The negative て-form can connect to another clause or appear in expressions such as なくてはいけない, meaning “must.”
JA: 食器を洗わなくて、母に叱られた。
EN: I got scolded for not washing the dishes.