Wait until

You can add the action card “Disable flow [Flow_Name]”, to disable the flow after a notification was sent.
Also add the action card “Enable flow [Flow_Name]” with 2 hour delay (the time of a dry cycle)

An other way is to create a Y/N variable X
-dryer power changed
-dryer power is below 8
-logic Variable X is NO
-send notification
-set logic variable X to YES
-set logic variable X to NO with 2 hour delay

You can use Telegram Notifications app, to send a pre-defined question to a Telegram user (or group) when a dryer notification was received;
You can use pre-defined answers to choose from, or let the user enter a valid value or word(s), which can trigger (parts of) a flow:

The flow is importable