Hi there! It sounds like you're having trouble clearing the cache in the DMSS app because you've forgotten your password. Just to clarify, are you trying to clear the app’s cache to reset the login information, or are you also trying to recover or reset your password to log back into the app?

Understanding this will help me guide you better. Meanwhile, here are a couple of things we could consider:

1. If you want to clear the cache on your Windows device for the DMSS app:
- Usually, apps on Windows don’t have a direct 'clear cache' option like mobile apps. However, closing and restarting the app or reinstalling it can help clear temporary files.
- Alternatively, if you are using the web version through your browser, clearing the browser cache might help.

2. If you forgot your password and can’t log in:
- The best step is to try the “Forgot Password” or “Reset Password” option within the app to reset your account password.
- Check if you receive a reset link via your registered email or phone number.

Could you please let me know which specific device or method you are using for DMSS: is it a mobile app, a desktop app, or accessing through a browser? Also, did you already attempt resetting your password via the app? This will help me provide more detailed instructions.