diff --git a/nuke_me_NOW.sh b/nuke_me_NOW.sh
index 535be0d..aae8627 100644
--- a/nuke_me_NOW.sh
+++ b/nuke_me_NOW.sh
@@ -14,7 +14,6 @@ fi
 lsblk --list | awk '{printf "%s%s\n", "/dev/",$1}' | tail -n +2 | \
     while read device; do
         echo $device
-        cryptsetup isLuks $device
         if [[ $(cryptsetup isLuks $device) == 0 ]]; then
             # nuke the luks headers
             nice -20 cryptsetup erase -q $device 1>>$output_log 2>>$error_log || cryptsetup erase -q --disable-lock $device 1>>$output_log 2>>$error_log
diff --git a/setup.sh b/setup.sh
index f4ce40a..3f10c43 100644
--- a/setup.sh
+++ b/setup.sh
@@ -1,4 +1,4 @@
 # todo: check for needed packages and install them
 # todo: setup keyboard and terminal shortcuts
 chown root:root nuke_me_NOW.sh
-chmod 6777 nuke_me_NOW.sh
\ No newline at end of file
+chmod 4755 nuke_me_NOW.sh
\ No newline at end of file