Any non ammonia window cleaner with a micro fiber cloth will work fine. I use the natural cleaner you can buy at Walmart, for about $2.

I also recommend 210 plastic cleaner and polish. I've used it for years on my boat isinglass with great results and now on my golf carts.

Plexus is good, but Novus plastic polish is better in my experience.
This I stumbled onto this product 30+ years ago at a commercial acrylic wholesale place and I haven't found anything else that comes close.

Simply rinse off the cart with a hose, spray on the Novus and lightly buff it off with a clean microfiber cloth. It contains ingredients that actually nourish the plastic and replace oils in it. You probably won't need it but you can also try the fine scratch remover which also works fantastic.

I actually use it so much I just buy it in the 64 oz jug.

NOVUS 7020 | Plastic Clean & Shine #1 | 8 Ounce Bottle https://a.co/d/g6S5iCS

This I stumbled onto this product 30+ years ago at a commercial acrylic wholesale place and I haven't found anything better.

Simply rinse off the cart with a hose spray on the Novus and lightly buff it off. It contains ingredients that actually nourish the plastic and replace oils in it. You probably won't need it but you can also try the fine scratch remover which also works fantastic.

I actually use it so much I just buy it in the 64 oz jug.

NOVUS 7020 | Plastic Clean & Shine #1 | 8 Ounce Bottle https://a.co/d/g6S5iCS

I use Klear-to-Sea. I have used this on my boat enclosure for years.

Get Novus 2 to buff out the dull spots. Use Novus 1 regularly for daily cleaning.

Agree with previous posters about the Novus products. I had been using Novus for years on motorcycle windshields, and it is a definite go-to for the Isinglass plastic on golf cart enclosures. You can buy a kit that includes all 3 "steps" of their product. #3 is for heavy scratches, #2 for mild scratches/clouding, and #1 is the polish. For golf carts, you will likely never need #3, but it could help salvage severely scratched or clouded plastic. Try some...you'll leave the other products in your rearview mirror.

Clear plastic canvas window
 

I use Pledge furniture polish and it’s also good on the windshield.

Ain't nothing grandma's spit and an old hanky can't clean. 🤠

My cart 12 years old and I can see just fine.

Plexus
 

Per Amazon, product is no longer available and not sure if it will be.

That's odd. I bought some last week from Amazon. If you've ever owned an airplane, boat or motorcycle with a windshield, Plexus is the only product to use.

Novus is similar, but has more abrasives in it (depending on which one you buy).

Meguiar's also has a similar product.

Tip to clean clear plastic
 

Plexus is a favorite of pilots/airplane owners. Tip: wipe in a vertical motion only….. not circular.

No big deal with my Cirrus, but this canopy took a lot of Plexus and you needed extra long arms to avoid the "circular". Good point though, I forgot to mention that!

thanks