It makes clothes softer, hence the name fabric softener :)
Yes, if it is the liquid. I have clothes with blue splotches on them from the fabric softener.
Yes
Because sometimes if you use fabric softener on certain type of pants, it could ruin them.
The reason why clothes shrink when we wash them is because we wash them in cold water. Try washing them in warm water and do not add to much fabric softener because it can also ruin your clothes.
yes. else the fabric will become hards as the softener dries out
Mainly to prevent wrinkling and soften clothes
There is no such thing as HE fabric softener and its not needed.
No, a fabric softener sheet can not be used indefinitely. After one or two uses, it will lose its scent and ability to keep clothes soft and free of static.
yes, you can! a fabric softener makes the fabric softer, and decreases wrinkling, as well as inhibiting static buildup,or static cling. but it is not necessary to use fabric softener if the aforementioned issues do not bother you(wrinkles, static).
Run a HOT water cycle with a cup of bleach but, with NO clothes in it.
It will tell you on the back of the bottle, usually it is in the final rinse cycle. It is kinda tricky using fabric softener, if you pour it directly on your clothes or even don't mix it with the water good enough first it will leave greasy looking spots on your clothes. I stop my washer right before the final rinse, take my clothes out, let the fabric softener and water mix really good then add my clothes back in.