Hi. Your liver will be chugging away keeping your levels where your liver thinks they should be. Unfortunately the liver's decision seems to be based on how your BG has been recently - so if it's been high, the liver will be keeping it high.
That means, unless you go down the route of glucose lowering medication, there is little you can do in the short term to reduce your levels. Some people say that exercise will reduce levels, others that exercise will tend to increase them - it's really down to what your liver decides you need.
This means that if you want to reduce your BG, you need to think of it as a longer-term project, not just for today/tomorrow. It took my liver about five to six months to accept that I didn't need the higher BG levels I'd been at before.
I don't know if what worked for me would work for you - my tactic was to greatly reduce carbs and try to minimise the time in which my BG was high. Everybody's BG will rise when you take in carbs, because they are digested to glucose. That's to be expected. Keeping that rise low, and to as short a time as possible, helps to persuade the liver that a high BG isn't "normal" anymore.
does that help?