Could just be the temperature of the room that makes the lipstick dried quickly, I know a lot of Singaporean buildings uses air conditioner so I think that's the thing that making the wax cooled faster
I know the struggle with those crayon lipsticks. My little sister got that for Christmas and wanted me to do it with her so I did. Definitely dries too quickly and also the instructions on how to melt it takes too long and doesnt really work well. Also, they dont mix well
I have that exact bath bomb kit. It worked so amazing!! The scent wasn’t an issue for me and my kids because I don’t want it irritating her privates with scent.