My product has become stickyUpdated 9 months ago

The stickiness issue is a known and natural occurrence with certain types of plastics. 

In some cases, you can mix baking soda/potato starch with lukewarm water to gently polish away the oils and sticky residue. 

Tip 1: 
Mix 20g baking soda with 15ml water. Apply this product and wipe it with a damp cloth.

Tip 2: Apply potato starch to the part that has become sticky. Then wipe off using a damp cloth.