Daiso Riddle Shot 500

I bought and used Riddle Shot 500 from Daiso~

I used up all the product in one pack, and it was too much. After about two days, I could see my skin peeling off a thin layer of dead skin cells!

Is it okay if I use half of it and seal it and then use it again..?

There was quite a lot of it..

I don't use it often, so I ended up not using it, and I used 2 packs and have 6 packs left.