Why are hotel bath towels so soft?

Problem description:

I often travel on business and find that the hotel bath towels are always white and soft, and the bath towels at home are the same, but they are always hard after drying. I also used softener, but it didn't work. I wonder how the hotel bathes towels.

Analysis:

The main reason is that the hotel uses a large dryer, plus a softener, which is the effect. If you soak the towel with softener for 5 minutes at home, then wash it, and finally use a dry towel, you can basically achieve that effect.