With my delicate clothes even though my mom sed she would be careful washing them and put them in the delicate cycle I still take and wash all my delicate clothes in the bathtub myself and add some soap but you have to make sure you get all the soap out or you'll be itching if you wear them after!!!
Get a big bowl and fill it up with cold water. add soap mix it up and put your delicate shirt or watever and be gentle when you rub it and then get the soap out with another bowl of cool water and always be gentle with it.
handwash it and while washing, rub the pieces of the fabric together but gently
Yes you can wash them in the bathtub or sink if you don't wanna use a bowl. <3
Most washing machines have a delicate cycle ... check your machine