3rd If you want to harden fondant without cmc, you can use the cornstarch as an alternative in the same way as the cmc. By mixing it, we will get it to absorb the moisture it has and will make it dry sooner. But personally, it is not the best option.
4th Fan: this option is great for summer. Place your figure in front of the fan and leave it for hours. You will get to dry pieces sooner, as it is receiving much more air. It will lose moisture.
5th Dehumidifier. Undoubtedly, a very good option, especially if you live in a very humid climate. It is an electrical device that absorbs humidity from the environment, so it will also affect our fondant figures and will make them harden sooner. Here you can read more about it.
If you ask me about my favorite one, I will tell you I like to use cmc and a dehumidifier, they are a perfect combination, which make the figures dry earlier and faster. Hope you can choose easily how to dry your fondant toppers quickly.