Gone over to hot WFP today

but the hose connector on the outside of the reel which comes from pump/ heater keeps unscrewing itself when i wind in. Its not the push in part its the bit which has the hose on at the rear of the connector.
This never happened before we were hot so im presuming its the flexibility of the soft hose.
We currently have the brass style connectors is there a better option or a way of keeping it on???