diff --git a/src/app/babylon/view/mark-window/mark-window.ts b/src/app/babylon/view/mark-window/mark-window.ts
index ad20b33..d41aa15 100644
--- a/src/app/babylon/view/mark-window/mark-window.ts
+++ b/src/app/babylon/view/mark-window/mark-window.ts
@@ -174,7 +174,7 @@ export class MarkWindow extends UIBase {
     onHide() {
         super.onHide();
         this.selectMarkNode(null, null);
-
+        SpeakingTool.Instance.clear();
     }
 
     onShow() {
diff --git a/src/app/service/babylon/building-basic-infos.service.ts b/src/app/service/babylon/building-basic-infos.service.ts
index 3e13043..72e95d6 100644
--- a/src/app/service/babylon/building-basic-infos.service.ts
+++ b/src/app/service/babylon/building-basic-infos.service.ts
@@ -183,7 +183,7 @@ export class BuildingBasicInfosService {
    * @param params 
    */
   deleteInfos(api: string, params = {}) {
-    return this.http.get<string>(api + this.c_delete, { params: params }).pipe(
+    return this.http.delete<string>(api + this.c_delete, { params: params }).pipe(
       catchError((err) => this.handleError(err))
     );