A couple of suggestions...
1) A commerial spray, Deer Off is one. A little pricey, in fact, quite pricey. It works and usually only takes 1 application. The deer learn quickly. But be careful not to get it on your hands or food you will be eating, as it is difficult to get the taste off.
2) Make your own by using a few eggs, and hot sauce, whip up the whole thing, add enough water to make 1 gallon. Set in a warm spot, in the sun is great for a few days until the eggs rot. Strain it, and use in your 1 gallon sprayer. This year I am added a bit of dishwasher detergent to help with insect pests. You will have to really clean out the sprayer as the egg gets stuck in the sprayer. This works almost as well as the commercial products. Works for rabbits as well, except they are not quite as smart and it has to be reapplied often for them.
3) I am experimenting with a sound deterrent called 'Yard Guard'. It has different settings for various animals. It has worked for the dog and cat urine problems and now I am ready for the skunk and raccoon settings. They have an long corded adaptor and will operate on c batteries. We have one battery operated and one on electric current. I bought our 2 thru Home Depot's internet site & they came to $98. Free shipping with $100, so ordered a small something to get the free shipping.