@ozgirl I’m storing it in a LLDPE tube with PP cap. Here are some photos: I think maybe you’re right because there were many white particles in the foil seals of tubes.
@ngarayeva001 thanks for your comment. If the white particles were SCI crystals then they would be re-soluble in hot water, right? But when I dispersed the face wash cream with white particles in hot water, they were still there.