Perhaps too much moisture. Do you have them where they are getting natural sunlight? That could help to dry them out.
Looks like too much water, not enough drainage? You can always take to your local nursery to get more information for your area and project.
Hello. Spots on succulents is likely too much water. Heres a link that might be helpful.
Is a sprinkler hitting them and then sun shining on the drops? The spots looked dried out to me.
water spots. Always water the soil under the plant.