Recently in the SMP server I play on I dug down close to bedrock and cleared out a huge area 3 blocks high. As I was digging a few slimes would spawn in the base occasionally. This was before I started lighting up the surrounding caves. I identified the chunk in which the slimes spawned and built the slime farm designed by xisumavoid on youtube. I then started exploring the surrounding cave systems and lit them all up. Ever since I started doing this NOT A SINGLE SLIME has spawned. I cleared out tons more area around the farm I had built just incase it was not the right chunk. Not a single slime has spawned in my base either. I don't understand. I thought lighting up the surrounding areas was supposed to increase mob spawning, not completely eliminate it. What am I supposed to do?