Washing a pcb for a few minutes is not enough time for their to be a concern for moisture ingress into the components.
Oven is fine to use, even with their temperature swing. There are several temp/time methods that have been adopted when you bake pcbs, from 60C-125C from 2hrs all the way to 100hrs. An oven set at 175F/80C for about 1-2hrs, even with high temp swing of 25-50F is still with adopted guidelines to bake off some moisture from a pcbs. I think the sweet spot for actual moisture bake off point is 105C, but this would be for pcbs/components that have exposed to moisture/high humidity levels for long periods of time/basically submerged
I think OP will be fine with just using an alcohol bath, but if he wants to wash his pcbs, using his oven to dry them off should not be an issue.