This product definitely works. We were being harassed for countless weeks by birds (Robins) sitting on our window sills and bouncing up against the window repeatedly. All day long. We'd chase them away and they would fly to the other side of the house and resume their assault. The droppings were everywhere. This was the first year we had this problem. I research several options and this was the only one that worked. And it worked immediately.

The problem was that everything that touches the gel now sticks to it. First a piece of dirt. Then a maple seed. Then a small bug. Soon I had a completely visible zig zag pattern of tiny debris on my white window sills, that you can see from across the yard and which causes a look equally as unpleasant as the bird droppings. We had to remove the gel, and the process of removing the gel was tedious. I used mineral spirits, as the directions suggest, and it took me nearly 2 hours to remove the gel from 7 windows. The gel was sticky enough that I had to scrape so firmly that my fingers are still sore 24 hours later. At this point, if the bird return, I'm not sure if I'll reuse this product, or just deal with the birds instead.

February 5, 2013: This product is absolutely brilliant! It is horribly sticky, difficult to see, and quite effective. The gel has transformed what had become a sort of meeting-place for flying vermin (aka, English House sparrows ... a non-native, invasive species imported from England in the mid 1800s) into a clean, quiet environment.

For those worried that the gel traps sparrows to die a horrible death, this is not the case. That said, they have to (loudly) remove themselves from the happy stickiness provided by Bird-B-Gone ... which seems to result in one-trial learning. The gel has worked well in our heretofore mild winter.

A couple of tips. One, do not even think of using this product without having several pairs of disposable, latex gloves with you. (Once the first pair is 'polluted' by the glue, roll them off, and replace with a new pair.) Two, use the pressure-release tab on your caulking gun liberally. Three, have a hole-less plastic shopping bag with you to hold the caulking gun while negotiating a ladder. No matter how careful I was, the caulking gun got 'polluted' by the gel ... did I mention that the gel is sticky . Have some individual paper towels, hanging out of a back-pocket. You will thank me. (Wipe once, fold the residue inside, crumple the towel, and throw it away immediately.)

While costly, the improvement is priceless. (Buy an extra tube. It doesn't go as far as you will initially estimate.)

March 8, 2016 Addendum. Well ... some 3 years later ... I had to add some of this sticky wonderfulness to several potential sparrow nesting spots yesterday. (Over the years, pollen and leaves had reduced the effectiveness of the original treatment.) Saturday, the day before yesterday, the sparrows told us that the time was right for the 'refresh.' Those of you whom enjoy trashy invasive vermin waking you up shortly before daybreak ... well you just go right ahead enjoying it. To reuse a line made famous on the Fox show, In Living Color, "Homey, don't play dat!"

We'll continue to cherish the peace and quiet Bird B Gone MMTBG Transparent Bird Gel, 10-Ounce restored for us this morning. And all of you PeopleforEatingTastyAnimals types, there were some feathers in the remnants of the first application, but no corpses of dead birds.

BTW. Re-using/emptying the partially used tube (remaining from the original application) was no problem at all. For three years that partially used tube had been on the shelf, inside a plastic bag. It had not even formed a skin at the nozzle! I've ordered a couple of more tubes so that if I need them, I'll have them on-hand.

I used this for squirrels or chipmunks that got into my attic. Spreading it on wasn't easy (you need to use a caulking gun) because my surfaces where the animals were getting it weren't level or uniform. It was a mess putting it on, and midway through doing it I was about ready to give up. My job was just so uneven it seemed like it was turning into a fail, but I spread it everywhere I could since I was already at my rental property, on the ladder, so...why not finish up?

A couple weeks later I checked in with my tenants to see if they still heard the animals in the attic. I fully expected a 'yes' since my spreading job was so half-@$$ed (not my fault!). Much to my surprise, my tenants said they hadn't heard anything from them again.

Read up on the internet on them. The word is they're pretty hard to get rid of. Once they set up shop, they're reputed to keep coming back to the point where if you trap them and catch them you have to take them miles and miles from your house so they don't return. What's my point?

The squirrels must hate this stuff so much that they git a little of this on their feet and they're gone. Saved me lots and lots of money.

so, it is messy... but it will keep birds or squirrels off your stuff. I had squirrels climbing into my potted garden plants and eating my stuff, so I put a bead around the edge, the next day no ripe tomato was touched, but, there was flattened area in my bead, and sticky paw prints on my deck he he he
I also put some on plastic wrapped rocks by my fish pond, now when the birds land to try to eat a fish or take a bath in my pond, they get sticky feet, the plastic wrap makes cleaning up later easy.
this stuff does melt in the hot summer sun but is still a sticky mess no animal wants to step in. I started to put it on lengths of wood on my pots to keep the pots clean but still keep animals from hoisting up on the edges.
I am betting this would work for birds that attack your car windows in spring, but put plastic wrap down first (maybe hold in place with magnets or easy to remove tape?) then put the gel on the plastic food wrap. it works on my rocks, birds hate this.
I am finally getting the fruits of my labor in my garden and the vermin have not come back, guess he is still trying to clean his paws? learned his lesson? found an unguarded garden elsewhere.... either way, my vegetables are for me now.
I think this would be good to protect a fruit or nut tree from climbing animals, put a ring around the trunk (or wrap in plastic wrap and coat that....) would be worth a try.
oh, I should add you do need a caulk gun to use this, but you should get one anyway if you dont own one. cheap and handy. remember to release pressure on the gun when your done and recap. a little goes a long way.
good luck to everyone who tries this, I love it. less work than trapping......

Amazing small amount made the difference on my white mailbox post. I only used a very small amount in relation to the size of bird I was dealing with and used a paint scraper to thin the liquid as thin as possible. Before pressing trigger on gun, be sure you poke several holes in the tubing seal to allow the contents to flow to the nozzle or you will bust the cartridge and have a big mess. Since this stuff never gets hard,It should not set up and will be ready for reuse later as needed. It will wear off over time if you get a a lot of rain, if you use thin amount as I did. Be sure to save and use the snap on cap after use and keep tube in upright long term storage position with nozzle pointing up.