yes, check your collimation and give the scope an hour or so to cool, but don't expect much from Jupiter right now. we are under a very strong jetstream and looking through it at low angles sandblasts the view. the only chance of getting some of the lower contrast detail is when the 200hPa jetstream is below about 50 knots.
http://www.bom.gov.au/australia/char...t=Refresh+View