Amanda Bynes’ Parents -- We're NOT Paying for Gas Fire Damage

Amanda Bynes' parents REFUSE to pay for the fire damage their daughter allegedly caused on a neighbor's driveway late Monday night ... telling TMZ it's Amanda's mess to clean up.

We spoke with Amanda's father who tells us he has no intention of paying for any damage or cleanup related to the blaze ... saying, "Amanda needs to pay for it."

TMZ broke the story ... cops believe Amanda used a gas canister to ignite a small blaze in the driveway of an elderly widow who lives in the same neighborhood as Amanda’s parents in Thousand Oaks, CA.

That woman, Bonnie Braaten, turned down an offer from a neighbor who volunteered to power wash her driveway and clean up the mess from the fire. Braaten thinks Amanda’s parents ought to pay for the cleanup ... but clearly, the feeling ain't exactly mutual.

Amanda is currently hospitalized involuntarily on a 5150 psychiatric hold -- while officials examine her mental state.