Certified GKH Gardening Expert
This is, typically, a sign of overwatering. These are somewhat drought tolerant, and will like their soil to dry out between waterings. You should sprinkle a little wettable sulfur onto the soil before the next watering, and this will help clear things up a bit.
Here is an article on their care: https://www.gardeningknowhow.com/houseplants/spider-plant/spider-plant-care-gardening-tips-for-spider-plants.htm