Try replacing the engine coolant temp sensor.
have the heaters check, i had the same problem but fixed when changed heaters.
Timing Advance not working or fuel sensor messed up.
A hard start when the engine is hot but a good start when cold can be attributed to several factors. One common issue is vapor lock, where fuel vaporizes in the fuel lines, making it difficult for the engine to start. Additionally, problems with the ignition system, such as faulty spark plugs or ignition coils, can also cause difficulty when the engine is hot. Checking the fuel system and ignition components can help diagnose and resolve the issue.
Hot sugar is soft, when you add cold liquid it will get hard at once.
hot and cold combined.
it should start at cold
It depends on the temperature you feel; if your going from hot to cold or cold to hot whether its with water or air/wind it could make your boobs hard. Also if you rub your nipple it could make them hard.
The wax starts to get hard and cold
because the stater get hot you may need to change the stater
Pour cold/hot water on his face
Pour cold/hot water on his face
The cap should have a dipstick attached to it with lines on it for hot & cold levels