clear button is not working the second time

[civilelectrico]

thanks to @guygriffiths and @jacoduplessis for this great code. Everything is as I was expecting except that the "clear all" button is working only one time. For example, try the following:
1.-click on "Clear all" button (this is working ok)
2.-later select the single filters one by one.(this working ok, too)
3.-later, click on Clear all button once again. (this second time is not working)
Please, could you try this behavior and fix if it's like this for you?
B.R. and Thanks in advance.