Oh yeah. Never happened to me before but for some reason, I just can't stop this particular valve/tyre/rim blocking the crap outa mine and causing slow leaks.What was difficult about inflating it with a compressor? Sometimes the valves get gunked up from the tyre sealant, which will make them both difficult to fill and can create a slow leak.
Have you got any supplier/brand that you've bought off Ebay that has been decent quality and that you'd recommend?Might be easiest to replace the valve, if that's what you suspect it is. They're cheaper than chips on eBay.