diff --git a/scratchpad/clickbank.py b/scratchpad/clickbank.py
index c0d6fb6..9d0bc56 100644
--- a/scratchpad/clickbank.py
+++ b/scratchpad/clickbank.py
@@ -60,7 +60,15 @@ def find_windows(substring):
             buffer = ctypes.create_unicode_buffer(length + 1)
             user32.GetWindowTextW(hwnd, buffer, length + 1)
             if substring.lower() in buffer.value.lower() and user32.IsWindowVisible(hwnd):
-                found.append((hwnd, buffer.value))
+                # Skip zero/degenerate clients: the game also owns a
+                # "BattleTech - Plasma" window with a 0x0 client, and taking
+                # windows[0] blindly posted every click into it -- 144 clicks,
+                # zero dispatches, and a scary-looking false regression
+                # (2026-07-26).  A window you cannot click in is not a target.
+                r = RECT()
+                user32.GetClientRect(hwnd, ctypes.byref(r))
+                if r.right > 50 and r.bottom > 50:
+                    found.append((hwnd, buffer.value))
         return True
 
     user32.EnumWindows(callback, 0)