Not exactly cosmetics (apologies)… but I am hoping that somebody may be able to help me with this one. I have a cleaner containing water, EDTA, APG, fragrance, OIT and MIT. This is an existing formulation that I did not write and 99% of the time, is perfect. 1% of the time, a white precipitate drops out. The white material is solid, dissolves back in to liquid when heat is applied. I have tried excluding each material, freeze thaw, overdosing and under dosing raw materials, more acidic, more basic, heat etc… I cannot replicate issues found in manufacturing process. Any ideas?