There are easy ways around the problems caused by hard water:
1) Tip 1
Put your clothes in the washing machine (separate coloured clothing from your whites), and fill the washing machine with warm water. Pour 2 cups of vinegar into the machine and allow the clothes to set in the solution for two hours.
2) Tip 2
Wash the clothes for two complete cycles. Add a water-softening laundry detergent, such as Surf Excel Liquid, with your usual detergent powder according to the manufacturer’s directions.
3) Tip 3
Once the third cycle is complete, inspect the clothes for any more stains. If stains remain, repeat the entire process; otherwise, dry the clothes as you normally would, in the dryer.
4) Tip 4
The same process can be undertaken for your whites.