Difference between BP 5% Gel and Face wash

I recently bought an OTC BP 5% gel from Benzac, and was wondering whether the gel form is only used for spot treatment/should be washed after 1 minute or is it okay to use on the whole face/leave it on throughout the night? (after moisturizer ofc.)

PS- Is the ‘NIVEA soft’ moisturizer good enough for use before/after BP?

Either way is fine, but the short contact method is better in my opinion. Leaving it on overnight is unnecessary. 1 minute of contact time with the 5% gel or the wash is sufficient