diff --git a/gadget.md b/gadget.md
index edcad0d..30afa82 100644
--- a/gadget.md
+++ b/gadget.md
@@ -5,6 +5,7 @@ Based upon Adafruit guide: https://learn.adafruit.com/turning-your-raspberry-pi-
 The author discovered the guide was out of date, consulted the [2025 Raspberry Pi whitepaper on OTG](https://pip-assets.raspberrypi.com/categories/685-app-notes-guides-whitepapers/documents/RP-009276-WP/Using-OTG-mode-on-Raspberry-Pi-SBCs), found additional errors, and was finally able to correct them thanks to this blog https://www.isticktoit.net/?p=1383
 
 ## Important :
+- Some of the serial cables we get from our supplier are flakey:  if wiggling the cable when plugged into your computer causes it to sometimes see the serial port and sometimes not, get a new one.
 - **Using the Gadget Mode will make the usb port unable to connect to a mouse or keyboard!!!** You will need to disable it make them work again.
 - You will want to disable the serial console on RX/TX in `raspi-config` if you are trying to use that serial port for communicating with other devices.