Thanks for the replies so far..

I'm riding a 3 by 9 speed Polygon Xtrada 5 with disc brakes.

I've been experiencing jumps in gears especially when shifting down. Cassette and chain a little rusty also. Otherwise, the ride has still been alright for me.

Thinking of sending my ride to New Era Cycle for servicing to check the various parts. Might even be interested to do a little upgrading.

wat sort of bike u own? when cycling what aspect of it needs to be addressed i.e does it shift badly, brakes weakly or perhaps stem, fork a bit loose? are there hydraulics involved or everything's cable operated for example? for me if cost of miantenance hits a certain point getting a new bike might be the smarter play provided we aren't talking about a super high end bike of course haha

What sort of bicycle u using? any target servicing budget in mind? partial or full servicing or plus spare parts replacement inclusive? thanks.