How to keep neighbors dog off my side off porch/Deck?

My neighbor and I share a huge back porch.Its large enough we both have gas grills we both have patio sets mine is a 6 chair large round table and her grill is a 5 burner and a side burner. so we are talking plenty of room.So this summer her son moved out.So she doesn't walk the dog its half lapsa half something not a big dog. She isn't old> the neighbor she has a 11 year old .They wont walk the dog so it urinates and poops all over the porch she doesn't clean her side at all.I put a mop broom and bucket for all to use as a hint.NOPE.talk to the landlord.He talked to her nope.The adjacent Businesses under us have complained from the urine dripping down .She don't care.I asked the landlord to purchase me a gate . He aid for me to get it.She isn't my tenant ! so any natural repellents to keep the dog of my side.I mean I sprayed the porch with bug barrier cause we get flys and ants bad well with the poop it attracts them more.i go to the fridge next to the window i will see poop and a family of flys on my screen staring at me.The smell is gross when the wind or fans blow.The only room I don't have air conditioning.Because the apartments electrical wont hold that much usage.I have them in 4 rooms already or i would have put one in the kitchen too.So any suggestions?I cant talk to her #1 she denies it #2 I will admit i am short tempered and have anger management issues ,# 3 she thinks she is wonder woman cause she don't take her medication and i truly love her daughter so wooping her moms azz over something petty ,i wouldn't be able to spend time with the daughter anymore.So suggestions please Thank you