Step 1: Ask what kind of lumps?
Loose lumps that can be broken into powder easily? Or compact lumps?
If loose lumps:
We would like to assure you that product quality and safety are our priority, and that the product you have on hand is safe for consumption.
Caking or appearance of powder lumping may be caused by environmental factors like humidity, transportation, temperature and storage. We recommend you store your Friso Gold tin in a dry and cool place.
If compact lumps:
To take back and do 1-1 exchange.