Ghost receiver gets very hot

The Ghost Receivers are designed to be powered by 5 Volts,  If they are getting hot, then it normally indicates that they are being powered by much more than 5V. 

Use a Voltmeter to test the voltage that the RX is being powered by.  If you have it on a 'pit switch' this may well be 10V.

If the receivers are driven with much more than 5V they are destroyed, as with most other low-voltage receivers in the FPV hobby.