How clear bootstrap modal on hide

this is the easiest fix:

$('#myModal').on('hidden.bs.modal', function () {
    $(this).find("input,textarea,select").val('').end();

});

Use val('') based on input types present and use #myModal instead of body

$('#myModal').on('hidden.bs.modal', function () {
        $('.modal-body').find('textarea,input').val('');
});

DEMO