Pico power consumption down to 0.02mA

Hi Gordon,
Sorry, I have checked my setup and all is OK with GND. I observe the following points :
1) I save the code, set deep sleep, disconnect USB and the consumption is about 30uA : OK
2) I disconnect the battery and reconnect it : the consumption increases to 600uA
3) I reconnect USB and connect the board (with IDE) and set deep sleep : always 600uA
4) The only way to obtain 30uA is to restart with point 1

I have done these 4 points with and without B6 and B7 to GND. The best result is without.
I also tested with B6 and B7 „digitalRead“ or not… the problem is the same.

The firmware is 1v85.227 (I hope the link above is OK) and the code is :

digitalRead([B0,B15,B14,B13,B10,B1,A7,A6­,A5,A4,A3,A2,A1,A0,A10,B9,B8,A8,B7,B6,B5­,B4,B3]);
setInterval(function() {
  digitalWrite(LED1, 1);
  setTimeout(function () {
    digitalWrite(LED1, 0);
  }, 20);
}, 10000);
setDeepSleep(1);

Thank you for your help !