Gradual self-tanners: ever ..

I used some for a week+and every time was typical.

One day I applied some, went outside in the heat(no sun)and started sweating. My face was very hot and flushed. Later on after I washed it off and the results were drastically more noticable, it even looked as though I had a touch of a sunburn.(retained for several days)

-anyone had similar exp.?

-could it be the sweat or surface skin temperature increase?

-any other ways of increasing effectiveness?

They don't protect you from the sun, and even if it was a cloudy day your skin will still get damaged and possibly burnt. I'd say you did get sunburnt, even without the sun.

The gradual self tanners will only take you to a certain level of tan, they won't make you as dark as if you'd used an actual tanner and reapplied twice or three times a week.