Are you talking about Cottony Cushion scale?

Here is a link that might be useful:

Yes those are the bugs that are on my hoya. Over a two year period, they keep spreading all over this plant and now on to some others that i have. Any good ways of ridding of them?

I see that you are from Ontario.

I've never heard of Cottony cushion scale on house plants, so I'm wondering.....are you sure that you don't have mealy bugs, intead? Take a look at the attached image, just to make sure.

Mealy bugs are a very common pest of hoya, as well as other house plants.

Once we get the identification nailed down, we can discuss control measures.

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I looked at the picture. they look like the same cottony white bugs, those are mealy bugs?

Mealy bugs do look a little like cottony cushion scale but not once you've seen them both in person. I'd be willing to bet that you have mealy bugs.

The only thing I have ever used for these pests is isopropyl alcohol. A cotton swap dipped in the alcohol will help you remove a bunch of the insects, but you can also mix a solution of one part alcohol to three parts water and mist it on your plants. Be sure to aim for the critters. Repeated applications will be necessary, of course. Mealy bugs are very stubborn.

I wouldn't use it on any plants with fuzzy or very fragile leaves without doing a test first. I've used alcohol on a very wide variety of house and garden plants with no problem whatsoever.

To do a leaf test, apply the alcohol to a couple of leaves and check back daily to see if there is any foliage burn. If not, then go ahead and spray. Hoya, by the way, can absolutely be sprayed with the alcohol solution.

Sounds like you have alot of knowledge of bugs(dont have a camera yet) one of my cactus has bugs, keeps getting worse. Do you know of a certain bug that likes cactus only? I have about 30 cactus that may be at risk. Looks like little specks all over it. At first, I thought that it was just getting rough spots-but now I'm thinking that they are a bug of some sort.