diff --git a/mbpfan.conf b/mbpfan.conf
index 5f2fd5c..1c1c01d 100644
--- a/mbpfan.conf
+++ b/mbpfan.conf
@@ -1,7 +1,8 @@
 [general]
-min_fan_speed = 2000	# default is 2000
-max_fan_speed = 6200	# default is 6200
+# see https://ineed.coffee/3838/a-beginners-tutorial-for-mbpfan-under-ubuntu for the values
+min_fan_speed = 2000	# put the *lowest* value of "cat /sys/devices/platform/applesmc.768/fan*_min"
+max_fan_speed = 6200	# put the *highest* value of "cat /sys/devices/platform/applesmc.768/fan*_max"
 low_temp = 63			# try ranges 55-63, default is 63
 high_temp = 66			# try ranges 58-66, default is 66
-max_temp = 86			# do not set it > 90, default is 86
-polling_interval = 7	# default is 7
+max_temp = 86			# take highest number returned by "cat /sys/devices/platform/coretemp.*/hwmon/hwmon*/temp*_max", divide by 1000
+polling_interval = 7	# default is 7 seconds