By default the RadMaskedInput controls should not be caching their Value property. I am attaching a sample project, where I tested the described scenario, however the Value is cleared as intended. May I ask you to check it out and see how it differs from the setup on your end?
Should you need any further assistance, can you modify the sample project in order to demonstrate the scenario and send it back in a new support ticket (since project files cannot be attached to forum posts)? This will hopefully allow me to investigate further and better assist you.
I am looking forward to your reply.
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