False positive on ovulation test?

Vicki

So I got a super clear positive on my ovulations test this morning. I didn't believe it so was pacing around trying to think if I did everything right and realised I could smell vinegar. There was still a little bit of vinegar in my cup from cleaning it. I'm wondering if this could cause a false positive. I want to believe it and heck I'll take the chance anyway and try but just want to make sure I'm entering things into the app right.