diff --git a/apps/SeleniumService/selenium_DDMA_claimSubmitWorker.py b/apps/SeleniumService/selenium_DDMA_claimSubmitWorker.py
index c136140a..931bbce4 100644
--- a/apps/SeleniumService/selenium_DDMA_claimSubmitWorker.py
+++ b/apps/SeleniumService/selenium_DDMA_claimSubmitWorker.py
@@ -702,11 +702,36 @@ class AutomationDDMAClaimSubmit:
                             ti = tooth_inputs[idx]
                             self.driver.execute_script("arguments[0].scrollIntoView({block:'center'});", ti)
                             time.sleep(0.3)
-                            # Open the dropdown via JS focus (avoids element-not-interactable on click)
-                            self.driver.execute_script("arguments[0].focus();", ti)
-                            time.sleep(0.5)
-                            # Select the option matching the tooth number from the 1-32 dropdown
                             listbox_id = ti.get_attribute("aria-controls") or ""
+
+                            # Click the "^" chevron toggle button to open the dropdown.
+                            # It lives in the same container as the tooth input —
+                            # try progressively wider ancestor scopes.
+                            toggle_clicked = False
+                            for ancestor_steps in range(1, 6):
+                                ancestor_axis = "/".join([".."] * ancestor_steps)
+                                toggle_xpath = (
+                                    f"//input[@aria-label='Tooth'][{idx+1}]"
+                                    f"/{ancestor_axis}//button"
+                                )
+                                toggles = self.driver.find_elements(By.XPATH, toggle_xpath)
+                                if toggles:
+                                    try:
+                                        self.driver.execute_script("arguments[0].click();", toggles[0])
+                                        print(f"[DDMA Claim step4] tooth[{idx}]: clicked toggle btn (ancestor depth {ancestor_steps})")
+                                        toggle_clicked = True
+                                        break
+                                    except Exception:
+                                        continue
+
+                            if not toggle_clicked:
+                                # Fallback: JS focus the input to open the combobox
+                                self.driver.execute_script("arguments[0].focus();", ti)
+                                print(f"[DDMA Claim step4] tooth[{idx}]: no toggle btn found, used JS focus")
+
+                            time.sleep(0.5)
+
+                            # Select the matching tooth number from the 1-32 listbox
                             try:
                                 if listbox_id:
                                     option = WebDriverWait(self.driver, 5).until(
@@ -723,7 +748,7 @@ class AutomationDDMAClaimSubmit:
                                 option.click()
                                 print(f"[DDMA Claim step4] tooth[{idx}]: selected '{tooth}' from dropdown")
                             except TimeoutException:
-                                print(f"[DDMA Claim step4] tooth[{idx}]: dropdown not found, skipping")
+                                print(f"[DDMA Claim step4] tooth[{idx}]: option '{tooth}' not found in dropdown")
                             time.sleep(0.3)
                     except Exception as e:
                         print(f"[DDMA Claim step4] Could not fill tooth: {e}")