Hi,
my Onida dvd player is 3 yrs old, but stopped using it 6 months ago.
but recently subscribed to bigflix.

now sometimes, there is a lag in Playback of a DVD, after every 10 sec.
should i open the DVD player myself, and clean the dust,

or visit a professional.

or something else is wrong with it !

if you feel it is just the dust then try to clean from outside ! that is use a cleaning
solution from a trusted brand . if cleaning does not solve it then it is better to seek
the help of a servicing technician

You can try with a DVD lens cleaner.Easily available in market.