Dishwashing Liquid in Windshield Washer: Good or Bad?
Whether you own a car or use a Car Rental Bangkok service for business or travel, maintaining a clean windshield is essential for safe driving. Many drivers consider adding dishwashing liquid to the windshield washer reservoir to remove greasy stains, insect residue, and road grime more effectively than plain water.But is it actually safe for your vehicle? And should you do it with a Rental Car?
The Disadvantages
1. It Can Damage Rubber Components
Over time, the detergent may dry out rubber hoses, windshield seals, and wiper blades, causing them to harden, wear out faster, and reduce wiping performance.
2. It Can Clog the Washer System
Engine heat may cause detergent residue to become thick and sticky, potentially blocking the washer filter, hoses, and spray nozzles. This forces the washer pump to work harder and may eventually lead to pump failure.
These issues are especially important to avoid when driving a Rental Car or vehicles from a Van Rental Bangkok provider.

If you're using a Car Rental Bangkok service, never add household cleaning products to the washer reservoir. Instead, use windshield washer fluid specifically designed for vehicles, as it cleans effectively without harming the washer system or rubber parts. If you're looking for a trusted Car Rental company, a dependable Van Rental Bangkok service, or a long-term Rental Car, ECOCAR RENT-A-CAR offers quality vehicles, unlimited mileage, and flexible daily and monthly rental plans backed by more than 13 years of experience.
While dishwashing liquid may improve cleaning performance temporarily, the long-term risks to rubber components and the washer pump make it a poor choice. Using proper windshield washer fluid is the safest option for any vehicle, whether it's your own or a Rental Car, helping ensure a safer and worry-free journey.
Head Office Don Mueang Car Rental
Located at 279/57 Vibhavadi Rangsit Road, Sanambin Subdistrict, Don Mueang District, Bangkok 10210
Opening hours 0800 – 2000 hours Everyday
Call center 02 – 002 – 4606
092-284-8660 / 090-638-4888 / 086-993-3082
Line ID : @ecocar
Email : info@thairentecocar.com
WhatsApp : 0869933082
Siam Commercial Bank
Account number : 605-2588466
Account name : Thai Rent Eco Car Co., Ltd.
Swift - code เลขที่ SICOTHBK
Siam Commercial Bank Public Company Limited, Ongkharak Branch
Category : Bank
Address 439 Moo 1, Rangsit-Nakhon Nayok Road, Ongkharak Subdistrict, Ongkharak District Nakhon Nayok Province 26120 Telephone 037-381-258
Thai Rent Eco Car Co., Ltd. Head Office Taxpayer No. 0105556003679 No. 279/57 Grand I Design Village Vibhavadi Rangsit Road, Sanam Bin Subdistrict Don Mueang District, Bangkok 10210
Call 02-0024606
Vibhavadi Rangsit Road
**Read** Rental contract conditions (click)

