diff --git a/src/MarkdownSnippets/ContentValidation.cs b/src/MarkdownSnippets/ContentValidation.cs
index 4ebc9dfe..69fa00e6 100644
--- a/src/MarkdownSnippets/ContentValidation.cs
+++ b/src/MarkdownSnippets/ContentValidation.cs
@@ -131,6 +131,6 @@ static string Clean(string input)
         }
 
         builder.Append(' ');
-        return builder.ToString();
+        return StringBuilderCache.GetStringAndRelease(builder);
     }
 }
\ No newline at end of file