Silicon lubricant spray - for pushchair wheels

[TinyPenguin]

Which is the best to buy?
And where do I buy it from?

Thank you.

I just used WD40 from the pound shop - worked perfectly!

I have some "tableau" brand silicone spray. Came from local hardware shop. Works fine. I kind of doubt brand is important, at a guess homebase, b&q, halfords etc sell it.