diff --git a/conf/glances.conf b/conf/glances.conf
index fb3958e5..3fa1723c 100644
--- a/conf/glances.conf
+++ b/conf/glances.conf
@@ -160,8 +160,7 @@ disable=False
 # See https://scoutapm.com/blog/slow_server_flow_chart
 #
 # I/O wait percentage should be lower than 1/# (# = Logical CPU cores)
-# Leave commented to just use the default config:
-# Careful=1/#*100-20% / Warning=1/#*100-10% / Critical=1/#*100
+# Leave commented to just use the default config: 50/70/90
 #iowait_careful=30
 #iowait_warning=40
 #iowait_critical=50
@@ -172,7 +171,7 @@ total_warning=75
 total_critical=85
 total_log=True
 #
-# Default values if not defined: 50/70/90 (except for iowait)
+# Default values if not defined: 50/70/90
 user_careful=50
 user_warning=70
 user_critical=90
diff --git a/glances/config.py b/glances/config.py
index cfa44cc6..58f98910 100644
--- a/glances/config.py
+++ b/glances/config.py
@@ -238,17 +238,7 @@ class Config:
         self.set_default_cwc('cpu', 'user')
         self.set_default_cwc('cpu', 'system')
         self.set_default_cwc('cpu', 'steal')
-        # By default I/O wait should be lower than 1/number of CPU cores
-        iowait_bottleneck = (1.0 / multiprocessing.cpu_count()) * 100.0
-        self.set_default_cwc(
-            'cpu',
-            'iowait',
-            [
-                str(iowait_bottleneck - (iowait_bottleneck * 0.20)),
-                str(iowait_bottleneck - (iowait_bottleneck * 0.10)),
-                str(iowait_bottleneck),
-            ],
-        )
+        self.set_default_cwc('cpu', 'iowait')
         # Context switches bottleneck identification #1212
         ctx_switches_bottleneck = (500000 * 0.10) * multiprocessing.cpu_count()
         self.set_default_cwc(