You pay for the first month with a credit or debit card on the day you join.  Each following month we automatically bill the same card.  The day of the month you sign up will be your monthly automatic bill date. You’ll enjoy hassle free no-pay visits.


Your membership is tracked by your vehicle’s license plate number or an RFID sticker in the windshield. There are no membership cards or account numbers to keep track of.


As an Unlimited Wash member, you understand that your credit card will automatically charge each month until the Membership is cancelled or terminated. No prior notification of such charges will be provided unless the date or amount changes, in which case Super Sonic auto spa will provide at least 30 days’ notice prior to payment being collected, however, if Super Sonic auto spa increases the monthly charge by 10% or less, you waive any written notice of such increase to the amount of the recurring monthly charge.


Cancellations must be received at least seven (7) days prior to the next billing date; otherwise you may be charged for that month and the cancellation will not be effective until the following billing date.  No refunds or credits will be given for partial periods.  To cancel your membership visit Super Sonic auto spa, call 206-724-9700, or email supersonicautospa@gmail.com


The Membership is per vehicle. Taxis, limos, app-based transportation services and other professional transportation vehicles are prohibited; Super Sonic auto spa may terminate a Membership upon violation of these terms and conditions.


The Membership cannot be combined with other offers, discounts, prepaid washes or gift cards.  Membership is transferable upon purchase of a new vehicle and upon notice to Super Sonic auto spa. Super Sonic auto spa reserves the right to close car wash due to inclement weather, holidays, equipment maintenance, and store upgrades.


RFID Tags are applied to the front windshield and must be placed by a Super Sonic auto spa employee. Tampering with RFID tags will result in cancellation of Membership.


Super Sonic auto spa reserves the right to modify or cancel this program and the Membership at any time.