What can be used as an alternate for a lubricant that has no scent?

I give my boyfriend hand jobs and tit jobs, but we need a lubricant that has no scent so we don't get caught. Lotions have very strong scents, so we only use them on rare occasion if we can find one without too strong a scent. Lately we've been using hand soap, but that's not the most enjoyable and still has a scent. Baby oil's smell is to distinctive and vaseline doesn't work well. So, any suggestions?