It goes out , and the far corner of the lot settles into the regular darkness . The back seat of the car is cluttered with blankets and shoes and tents , a purse he ca n't figure out the owner of , and a box of napkins that 's still full but ripped apart , crushed under the weight of all the junk . Ivy has draped herself over the pile of junk , and stares out the window of the car , drawing aimless lines into the dust and she wonders how he can see out of the window , with the patina of grease and dust and the milky tint of age that 's crept into the glass . " Why have n't you ever washed this thing ? " " I do n't see the point .

Question: Why do they not wash their car ?
Answer: They prefer having their car look dirty .None of the above choices .They do n't want to ruin the mess in their car .They are too lazy to clean out the entire car .