diff --git a/goModClean.go b/goModClean.go
new file mode 100644
index 0000000..5d99024
--- /dev/null
+++ b/goModClean.go
@@ -0,0 +1,30 @@
+package fhelp
+
+import (
+	"fmt"
+
+	"go.wit.com/log"
+)
+
+func CheckGoModClean() bool {
+	if checkCmdSimple("go-mod-clean") {
+		return true
+	}
+	goModCleanInstructions()
+	return false
+}
+
+func CheckGoModCleanExit() {
+	if CheckGoModClean() {
+		return
+	}
+	badExit(fmt.Errorf("missing go-mod-clean"))
+}
+
+func goModCleanInstructions() {
+	log.Info("you are missing 'go-mod-clean' which is required")
+	log.Info("")
+	log.Info("you can:")
+	log.Info("   go install go.wit.com/apps/utils/go-mod-clean   # if you have go")
+	log.Info("")
+}