Goo kit lamp with sticking issue. I need help!

[Richard Zhang]

It's been three weeks since I made this lamp, and now the wax is sticking to the sides. Why is this happening? I meticulously cleaned the bottle and coated it with surfactant before adding the wax, and this is the result. Is there a way to solve this issue without having to start over again?

[Claude J]

its the lava