There can be several reasons that the Milk Café™ is having issues creating foam in milk even though it is heating it.

• If the milk is too warm, the Milk Café™ will not be able to foam it.
• Do not re-foam milk that’s already been heated. Cold milk forms foam significantly better then warm milk does.
• Always use cold, fresh (or freshly opened) milk.
• Make sure that the amount of milk is between the MIN/MAX lines on the inside of the frothing jug. If it does but the foam is still not occurring, try reducing the amount of milk in the jug.
• Check any added in ingredients. Thick syrups, heavy powders and large flakes can significantly reduce the amount of foam that is produced.
• Different brands of milk can froth differently. This is not entirely dependent on the type of milk (Non-Fat as opposed to Whole Milk) but can truly be different from brand to brand so try some experimenting.