diff --git a/src/install.sh b/src/install.sh
index 79709e9..23e839c 100644
--- a/src/install.sh
+++ b/src/install.sh
@@ -5,6 +5,7 @@ set -Eeuo pipefail
 
 if [ -f "$STORAGE/dsm.ver" ]; then
   BASE=$(<"$STORAGE/dsm.ver")
+  BASE="${BASE//[![:print:]]/}"
   [ -z "$BASE" ] && BASE="DSM_VirtualDSM_69057"
 else
   # Fallback for old installs
diff --git a/src/network.sh b/src/network.sh
index e14df9a..5932e16 100644
--- a/src/network.sh
+++ b/src/network.sh
@@ -399,6 +399,7 @@ getInfo() {
   if [ -z "$VM_NET_MAC" ]; then
     local file="$STORAGE/dsm.mac"
     [ -s "$file" ] && VM_NET_MAC=$(<"$file")
+    VM_NET_MAC="${VM_NET_MAC//[![:print:]]/}"
     if [ -z "$VM_NET_MAC" ]; then
       # Generate MAC address based on Docker container ID in hostname
       VM_NET_MAC=$(echo "$HOST" | md5sum | sed 's/^\(..\)\(..\)\(..\)\(..\)\(..\).*$/02:11:32:\3:\4:\5/')
diff --git a/src/proc.sh b/src/proc.sh
index 56b2466..129d70f 100644
--- a/src/proc.sh
+++ b/src/proc.sh
@@ -10,19 +10,20 @@ set -Eeuo pipefail
 : "${DEF_MODEL:="qemu64"}"
 
 CLOCKSOURCE="tsc"
-[[ "${ARCH,,}" == "arm64" ]] && CLOCKSOURCE="arch_sys_counter"
+[[ "${ARCH,,}" == "arm64" ]] && CLOCKSOURCE="arch_sys_counter"
 CLOCK="/sys/devices/system/clocksource/clocksource0/current_clocksource"
 
 if [ ! -f "$CLOCK" ]; then
   warn "file \"$CLOCK\" cannot not found?"
 else
   result=$(<"$CLOCK")
+  result="${result//[![:print:]]/}"
   case "${result,,}" in
     "${CLOCKSOURCE,,}" ) ;;
     "kvm-clock" ) info "Nested KVM virtualization detected.." ;;
     "hyperv_clocksource_tsc_page" ) info "Nested Hyper-V virtualization detected.." ;;
-    "hpet" ) warn "unsupported clock source detected: '$result'. Please set host clock source to '$CLOCKSOURCE'" ;;
-    *) warn "unexpected clock source detected: '$result'. Please set host clock source to '$CLOCKSOURCE'" ;;
+    "hpet" ) warn "unsupported clock source detected: '$result'. Please set host clock source to '$CLOCKSOURCE'." ;;
+    *) warn "unexpected clock source detected: '$result'. Please set host clock source to '$CLOCKSOURCE'." ;;
   esac
 fi