Borewell water causes harm when sitting trapped inside. Especially under the doors and panels. Make sure there's no water sitting inside. Often cars come with small holes under the doors. They get blocked with mud and grime. If your car has those holes..keep them clean.
There are windshield cleaner in the market. An Indian brand known as VISTA also has this. I've never used it but Jaggu has.
Put few drops of mild hand wash in your windshield washer can. They work really well and doesn't harm your paint finish. Those PALMOLIVE 'AROMA THERAPY' types
