Welcome to Ontario Mills Inc.   Home  |  100% Hand Car Wash |  Corner Cafe  | Coupons  | Online Detail Appointments    Rain Check Policy       You have three (3) days from the time you washed your car to bring it back for a free wash IF it rains   at our car wash or up to a ten mile circle. must have original (no photo copy) of rain check to make claim. claim is only good for the same vehicle that was actually washed. on your 4th day, we will not honor any rain checks.