diff --git a/runebuf.go b/runebuf.go
index 579dae4..11d8491 100644
--- a/runebuf.go
+++ b/runebuf.go
@@ -30,17 +30,7 @@ type RuneBuffer struct {
 }
 
 func (r *RuneBuffer) OnWidthChange(newWidth int) {
-	oldWidth := r.width
-	if newWidth < oldWidth {
-		sp := SplitByMultiLine(
-			r.PromptLen(), oldWidth, newWidth, r.buf[:r.idx])
-		idxLine := len(sp) - 1
-		r.clean(idxLine)
-	} else {
-		r.Clean()
-	}
 	r.width = newWidth
-	r.print()
 }
 
 func (r *RuneBuffer) Backup() {
diff --git a/utils.go b/utils.go
index 468ab9b..8ee2f8f 100644
--- a/utils.go
+++ b/utils.go
@@ -86,29 +86,6 @@ func escapeKey(r rune) rune {
 	return r
 }
 
-func SplitByMultiLine(start, oldWidth, newWidth int, rs []rune) []string {
-	var ret []string
-	buf := bytes.NewBuffer(nil)
-	currentWidth := start
-	for _, r := range rs {
-		w := runes.Width(r)
-		currentWidth += w
-		buf.WriteRune(r)
-		if currentWidth == newWidth {
-			ret = append(ret, buf.String())
-			buf.Reset()
-			continue
-		}
-		if currentWidth >= oldWidth {
-			ret = append(ret, buf.String())
-			buf.Reset()
-			currentWidth = 0
-		}
-	}
-	ret = append(ret, buf.String())
-	return ret
-}
-
 func SplitByLine(start, screenWidth int, rs []rune) []string {
 	var ret []string
 	buf := bytes.NewBuffer(nil)