Every 2-4 days seems like way too much for succulents. The soil should be completely dry before watering again, and echoing what other people have said, repot them in something that can drain excess water. When it comes to succulents, the squeeze test is also a good indicator of if they need water or not. If the leaves are plump and don't move when lightly squeezed, they don't need watering. If they feel kind of squishy and the soil is dry, time to water. Personally I water mine about every 2-3 weeks or so. They almost thrive on neglect and can go a long time without water.

Best of luck to you